diff --git a/README.md b/README.md
index 363e252..34327a3 100644
--- a/README.md
+++ b/README.md
@@ -53,7 +53,7 @@ print(words)
 pos = jiagu.pos(words) # 词性标注
 print(pos)
 
-ner = jiagu.ner(text) # 命名实体识别
+ner = jiagu.ner(words) # 命名实体识别
 print(ner)
 ```
 
@@ -61,7 +61,7 @@ print(ner)
 ```python3
 import jiagu
 
-text = '汉服和服装、知识图谱机器人'
+text = '汉服和服装、维基图谱'
 
 words = jiagu.cut(text) # 深度学习分词
 print(words)
@@ -70,7 +70,7 @@ words = jiagu.seg(text) # 字典分词
 print(words)
 
 # jiagu.load_userdict('dict/user.dict') # 加载自定义字典，支持字典路径、字典列表形式。
-jiagu.load_userdict(['知识图谱'])
+jiagu.load_userdict(['汉服和服装'])
 
 words = jiagu.seg(text) # 自定义分词，字典分词模式有效
 print(words)
diff --git a/demo.py b/demo.py
index a2e0c70..32d6b1a 100644
--- a/demo.py
+++ b/demo.py
@@ -3,25 +3,25 @@ import jiagu
 # jiagu.init() # 可手动初始化，也可以动态初始化
 
 
-text = '厦门明天会不会下雨'
+text = '在苏州冻成狗'
 
-words = jiagu.cut(text)  # 分词
+words = jiagu.seg(text)  # 分词
 print(words)
 
 pos = jiagu.pos(words)  # 词性标注
 print(pos)
 
-ner = jiagu.ner(text)  # 命名实体识别
+ner = jiagu.ner(words)  # 命名实体识别
 print(ner)
 
 
 # 字典模式分词
-text = '知识图谱机器人'
+text = '思知机器人挺好用的'
 words = jiagu.seg(text)
 print(words)
 
 # jiagu.load_userdict('dict/user.dict') # 加载自定义字典，支持字典路径、字典列表形式。
-jiagu.load_userdict(['知识图谱'])
+jiagu.load_userdict(['思知机器人'])
 
 words = jiagu.seg(text)
 print(words)
diff --git a/jiagu/__init__.py b/jiagu/__init__.py
index 5307580..13597f7 100644
--- a/jiagu/__init__.py
+++ b/jiagu/__init__.py
@@ -1,13 +1,5 @@
 #!/usr/bin/env python3
 # -*-coding:utf-8-*-
-"""
- * Copyright (C) 2018 OwnThink.
- *
- * Name        : __init__.py
- * Author      : Yener <yener@ownthink.com>
- * Version     : 0.01
- * Description : 
-"""
 from jiagu import analyze
 
 any = analyze.Analyze()
diff --git a/jiagu/__main__.py b/jiagu/__main__.py
index 68e374c..fe02def 100644
--- a/jiagu/__main__.py
+++ b/jiagu/__main__.py
@@ -1,11 +1,2 @@
 #!/usr/bin/env python3
 # -*-coding:utf-8-*-
-"""
- * Copyright (C) 2018 OwnThink.
- *
- * Name        : __main__.py
- * Author      : Yener <yener@ownthink.com>
- * Version     : 0.01
- * Description : 
-"""
-
diff --git a/jiagu/analyze.py b/jiagu/analyze.py
index 395dd38..58508de 100644
--- a/jiagu/analyze.py
+++ b/jiagu/analyze.py
@@ -1,17 +1,9 @@
 #!/usr/bin/env python3
 # -*-coding:utf-8-*-
-"""
- * Copyright (C) 2018 OwnThink.
- *
- * Name        : analyze.py - 解析模块
- * Author      : Yener <yener@ownthink.com>
- * Version     : 0.01
- * Description : 
-"""
 import os
 from jiagu import mmseg
 from jiagu import findword
-from jiagu import bilstm_crf
+from jiagu import perceptron
 from jiagu.textrank import Keywords
 from jiagu.textrank import Summarize
 from jiagu.segment.nroute import Segment
@@ -50,18 +42,18 @@ class Analyze(object):
 
 	def init_cws(self):
 		if self.seg_model is None:
-			self.seg_model = bilstm_crf.Predict(add_curr_dir('model/cws.model'))
+			self.seg_model = perceptron.Perceptron(add_curr_dir('model/cws.model'))
 
 	def load_model(self, model_path):
-		self.seg_model = bilstm_crf.Predict(model_path)
+		self.seg_model = perceptron.Perceptron(model_path)
 
 	def init_pos(self):
 		if self.pos_model is None:
-			self.pos_model = bilstm_crf.Predict(add_curr_dir('model/pos.model'))
+			self.pos_model = perceptron.Perceptron(add_curr_dir('model/pos.model'))
 
 	def init_ner(self):
 		if self.ner_model is None:
-			self.ner_model = bilstm_crf.Predict(add_curr_dir('model/ner.model'))
+			self.ner_model = perceptron.Perceptron(add_curr_dir('model/ner.model'))
 
 	def init_mmseg(self):
 		if self.seg_mmseg is None:
@@ -69,7 +61,7 @@ class Analyze(object):
 
 	def init_kg(self):
 		if self.kg_model is None:
-			self.kg_model = bilstm_crf.Predict(add_curr_dir('model/kg.model'))
+			self.kg_model = perceptron.Perceptron(add_curr_dir('model/kg.model'))
 
 	@staticmethod
 	def __lab2word(sentence, labels):
@@ -97,22 +89,13 @@ class Analyze(object):
 	def cws_text(self, sentence):
 		if sentence == '':
 			return ['']
-		labels = self.seg_model.predict([sentence])[0]
+		labels = self.seg_model.predict(list(sentence))
 		return self.__lab2word(sentence, labels)
 
-	def cws_list(self, sentences):
-		text_list = sentences
-		all_labels = self.seg_model.predict(text_list)
-		sent_words = []
-		for ti, text in enumerate(text_list):
-			seg_labels = all_labels[ti]
-			sent_words.append(self.__lab2word(text, seg_labels))
-		return sent_words
-
 	def seg(self, sentence):
 		return self.seg_nroute.seg(sentence, mode="default")
 		
-	def cws(self, sentence, input='text', model='default'):
+	def cws(self, sentence, model='default'):
 		"""中文分词
 
 		:param sentence: str or list
@@ -125,54 +108,31 @@ class Analyze(object):
 		"""
 		if model == 'default':
 			self.init_cws()
-
-			if input == 'batch':
-				words_list = self.cws_list(sentence)
-				return words_list
-			else:
-				words = self.cws_text(sentence)
-				return words
+			words = self.cws_text(sentence)
+			return words
 		elif model == 'mmseg':
 			self.init_mmseg()
-
 			words = self.seg_mmseg.cws(sentence)
 			return words
 		else:
 			pass
 		return []
 
-	def pos(self, sentence, input='words'):  # 传入的是词语
+	def pos(self, words):  # 传入的是词语
 		self.init_pos()
+		labels = self.pos_model.predict(words)
+		return labels
 
-		if input == 'batch':
-			all_labels = self.pos_model.predict(sentence)
-			return all_labels
-		else:
-			labels = self.pos_model.predict([sentence])[0]
-			return labels
-
-	def ner(self, sentence, input='text'):  # 传入的是文本
+	def ner(self, words):  # 传入的是词语
 		self.init_ner()
+		labels = self.ner_model.predict(words)
+		return labels
 
-		if input == 'batch':
-			all_labels = self.ner_model.predict(sentence)
-			return all_labels
-		else:
-			labels = self.ner_model.predict([sentence])[0]
-			return labels
-
-	def knowledge(self, sentence, input='text'):
+	def knowledge(self, text): # 传入的是文本
 		self.init_kg()
-
-		if input == 'batch':
-			all_labels = self.kg_model.predict(sentence)
-			result = []
-			for sent, labels in zip(sentence, all_labels):
-				result.append(self.lab2spo(sent, labels))
-			return result
-		else:
-			labels = self.kg_model.predict([sentence])[0]
-			return self.lab2spo(sentence, labels)	
+		words = self.seg(text)
+		labels = self.kg_model.predict(words)
+		return self.lab2spo(words, labels)	
 			
 	def keywords(self, text, topkey=5):
 		if self.keywords_model == None:
@@ -195,11 +155,11 @@ class Analyze(object):
 	def text_cluster(self, docs, features_method='tfidf', method="k-means", k=3, max_iter=100, eps=0.5, min_pts=2):
 		return cluster(docs, features_method, method, k, max_iter, eps, min_pts, self.seg)
 		
-	def lab2spo(self, text, epp_labels):
+	def lab2spo(self, words, epp_labels):
 		subject_list = [] # 存放实体的列表
 		object_list = []
 		index = 0
-		for word, ep in zip(list(text), epp_labels):
+		for word, ep in zip(words, epp_labels):
 			if ep[0] == 'B' and ep[2:] == '实体':
 				subject_list.append([word, ep[2:], index])
 			elif (ep[0] == 'I' or ep[0] == 'E') and ep[2:] == '实体':
diff --git a/jiagu/bilstm_crf.py b/jiagu/bilstm_crf.py
deleted file mode 100644
index 56e6cf0..0000000
--- a/jiagu/bilstm_crf.py
+++ /dev/null
@@ -1,77 +0,0 @@
-#!/usr/bin/env python3
-# -*-coding:utf-8-*-
-"""
- * Copyright (C) 2018 OwnThink.
- *
- * Name        : bilstm_crf.py - 预测
- * Author      : Yener <yener@ownthink.com>
- * Version     : 0.01
- * Description : 
-"""
-import os
-os.environ['TF_CPP_MIN_LOG_LEVEL'] = '2'
-import pickle
-import numpy as np
-import tensorflow as tf
-from tensorflow.contrib.crf import viterbi_decode
-
-
-class Predict(object):
-    def __init__(self, model_file):
-        with open(model_file, 'rb') as f:
-            model, char_to_id, id_to_tag = pickle.load(f)
-
-        self.char_to_id = char_to_id
-        self.id_to_tag = {int(k): v for k, v in id_to_tag.items()}
-        self.num_class = len(self.id_to_tag)
-
-        graph_def = tf.GraphDef()
-        graph_def.ParseFromString(model)
-
-        with tf.Graph().as_default() as graph:
-            tf.import_graph_def(graph_def, name="prefix")
-
-        self.input_x = graph.get_tensor_by_name("prefix/char_inputs:0")
-        self.lengths = graph.get_tensor_by_name("prefix/lengths:0")
-        self.dropout = graph.get_tensor_by_name("prefix/dropout:0")
-        self.logits = graph.get_tensor_by_name("prefix/project/logits:0")
-        self.trans = graph.get_tensor_by_name("prefix/crf_loss/transitions:0")
-
-        self.sess = tf.Session(graph=graph)
-        self.sess.as_default()
-
-    def decode(self, logits, trans, sequence_lengths, tag_num):
-        small = -1000.0
-        viterbi_sequences = []
-        start = np.asarray([[small] * tag_num + [0]])
-        for logit, length in zip(logits, sequence_lengths):
-            score = logit[:length]
-            pad = small * np.ones([length, 1])
-            score = np.concatenate([score, pad], axis=1)
-            score = np.concatenate([start, score], axis=0)
-            viterbi_seq, viterbi_score = viterbi_decode(score, trans)
-            viterbi_sequences.append(viterbi_seq[1:])
-        return viterbi_sequences
-
-    def predict(self, sents):
-        inputs = []
-        lengths = [len(text) for text in sents]
-        max_len = max(lengths)
-
-        for sent in sents:
-            sent_ids = [self.char_to_id.get(w) if w in self.char_to_id else self.char_to_id.get("<OOV>") for w in sent]
-            padding = [0] * (max_len - len(sent_ids))
-            sent_ids += padding
-            inputs.append(sent_ids)
-        inputs = np.array(inputs, dtype=np.int32)
-
-        feed_dict = {
-            self.input_x: inputs,
-            self.lengths: lengths,
-            self.dropout: 1.0
-        }
-
-        logits, trans = self.sess.run([self.logits, self.trans], feed_dict=feed_dict)
-        path = self.decode(logits, trans, lengths, self.num_class)
-        labels = [[self.id_to_tag.get(l) for l in p] for p in path]
-        return labels
diff --git a/jiagu/findword.py b/jiagu/findword.py
index c954e1b..bad7b75 100644
--- a/jiagu/findword.py
+++ b/jiagu/findword.py
@@ -1,15 +1,4 @@
 # -*- encoding:utf-8 -*-
-"""
- * Copyright (C) 2017 OwnThink.
- *
- * Name        : findword.py - 新词发现
- * Author      : Yener <yener@ownthink.com>
- * Version     : 0.01
- * Description : 新词发现算法实现
- special thanks to 
- http://www.matrix67.com/blog/archives/5044
- https://github.com/zoulala/New_words_find
-"""
 import re
 from math import log
 from collections import Counter
diff --git a/jiagu/mmseg.py b/jiagu/mmseg.py
index a2e6234..c154ef2 100644
--- a/jiagu/mmseg.py
+++ b/jiagu/mmseg.py
@@ -1,13 +1,5 @@
 #!/usr/bin/env python
 # encoding: utf-8
-"""
- * Copyright (C) 2018 OwnThink.
- *
- * Name        : mmseg.py
- * Author      : Leo <1162441289@qq.com>
- * Version     : 0.01
- * Description : mmseg分词方法，目前算法比较耗时，仍在优化中
-"""
 import os
 import pickle
 from math import log
diff --git a/jiagu/model/cws.model b/jiagu/model/cws.model
index 2992ea1..c56c9d0 100644
Binary files a/jiagu/model/cws.model and b/jiagu/model/cws.model differ
diff --git a/jiagu/model/kg.model b/jiagu/model/kg.model
index 26cf41e..5a24946 100644
Binary files a/jiagu/model/kg.model and b/jiagu/model/kg.model differ
diff --git a/jiagu/model/ner.model b/jiagu/model/ner.model
index 43e33f4..4e79d67 100644
Binary files a/jiagu/model/ner.model and b/jiagu/model/ner.model differ
diff --git a/jiagu/model/pos.model b/jiagu/model/pos.model
index 4f6f46e..6870c5d 100644
Binary files a/jiagu/model/pos.model and b/jiagu/model/pos.model differ
diff --git a/jiagu/perceptron.py b/jiagu/perceptron.py
new file mode 100644
index 0000000..3ab7584
--- /dev/null
+++ b/jiagu/perceptron.py
@@ -0,0 +1,227 @@
+# -*- coding:utf-8 -*-
+import os
+import gzip
+import pickle
+import random
+from collections import defaultdict
+
+class AveragedPerceptron(object):
+    def __init__(self):
+        # Each feature gets its own weight vector, so weights is a dict-of-dicts
+        self.weights = {}
+        self.classes = set()
+        # The accumulated values, for the averaging. These will be keyed by
+        # feature/clas tuples
+        self._totals = defaultdict(int)
+        # The last time the feature was changed, for the averaging. Also
+        # keyed by feature/clas tuples
+        # (tstamps is short for timestamps)
+        self._tstamps = defaultdict(int)
+        # Number of instances seen
+        self.i = 0
+
+    def predict(self, features):
+        '''Dot-product the features and current weights and return the best label.'''
+        scores = defaultdict(float)
+        for feat, value in features.items():
+            if feat not in self.weights or value == 0:
+                continue
+            weights = self.weights[feat]
+            for label, weight in weights.items():
+                scores[label] += value * weight
+        # Do a secondary alphabetic sort, for stability
+        return max(self.classes, key=lambda label: (scores[label], label))
+
+    def update(self, truth, guess, features):
+        '''Update the feature weights.'''
+        def upd_feat(c, f, w, v):
+            param = (f, c)
+            self._totals[param] += (self.i - self._tstamps[param]) * w
+            self._tstamps[param] = self.i
+            self.weights[f][c] = w + v
+
+        self.i += 1
+        if truth == guess:
+            return None
+        for f in features:
+            weights = self.weights.setdefault(f, {})
+            upd_feat(truth, f, weights.get(truth, 0.0), 1.0)
+            upd_feat(guess, f, weights.get(guess, 0.0), -1.0)
+        return None
+
+    def average_weights(self):
+        '''Average weights from all iterations.'''
+        for feat, weights in self.weights.items():
+            new_feat_weights = {}
+            for clas, weight in weights.items():
+                param = (feat, clas)
+                total = self._totals[param]
+                total += (self.i - self._tstamps[param]) * weight
+                averaged = round(total / float(self.i), 3)
+                if averaged:
+                    new_feat_weights[clas] = averaged
+            self.weights[feat] = new_feat_weights
+        return None
+
+class Perceptron:
+	def __init__(self, loc=None):
+		self.START = ['-START-', '-START2-']
+		self.END = ['-END-', '-END2-']
+		self.model = AveragedPerceptron()
+		
+		if loc != None:
+			self.load(loc)
+
+	def predict(self, words):
+		prev, prev2 = self.START
+		labels = []
+		context = self.START + words + self.END
+		for i, word in enumerate(words):
+			features = self._get_features(i, word, context, prev, prev2)
+			tag = self.model.predict(features)
+			labels.append(tag)
+			prev2 = prev
+			prev = tag
+		return labels
+		
+	def train(self, sentences, save_loc=None, nr_iter=5, shuf=False):
+		self._make_tagdict(sentences)
+		for iter_ in range(nr_iter):
+			c = 0
+			n = 0
+			for words, tags in sentences:
+				prev, prev2 = self.START
+				context = self.START + words + self.END
+				for i, word in enumerate(words):
+					feats = self._get_features(i, word, context, prev, prev2)
+					guess = self.model.predict(feats)
+					self.model.update(tags[i], guess, feats)
+
+					prev2 = prev
+					prev = guess
+					c += guess == tags[i]
+					n += 1
+			if shuf == True:
+				random.shuffle(sentences)
+				
+			print("Iter {0}: {1}/{2}={3}".format(iter_, c, n, (float(c) / n) * 100))
+			self.save(save_loc)
+			
+		self.model.average_weights()
+		self.save(save_loc)
+		
+	def save(self, loc='model/ap.model', zip=True):
+		if zip == False:
+			pickle.dump((self.model.weights, self.model.classes), open(loc, 'wb'))
+		else:
+			pickle.dump((self.model.weights, self.model.classes), gzip.open(loc, 'wb'))
+			
+	def load(self, loc='model/ap.model', zip=True):
+		if zip == False:
+			self.model.weights, self.model.classes = pickle.load(open(loc, 'rb'))
+		else:
+			self.model.weights, self.model.classes = pickle.load(gzip.open(loc,'rb'))
+			
+	def _get_features(self, i, word, context, prev, prev2):
+		'''Map tokens into a feature representation, implemented as a
+		{hashable: float} dict. If the features change, a new model must be
+		trained.
+		'''
+		def add(name, *args):
+			features[' '.join((name,) + tuple(args))] += 1
+
+		i += len(self.START)
+		features = defaultdict(int)
+		# It's useful to have a constant feature, which acts sort of like a prior
+		add('bias')
+		add('i suffix', word[-3:])
+		add('i pref1', word[0])
+		add('i-1 tag', prev)
+		add('i-2 tag', prev2)
+		add('i tag+i-2 tag', prev, prev2)
+		add('i word', context[i])
+		add('i-1 tag+i word', prev, context[i])
+		add('i-1 word', context[i - 1])
+		add('i-1 suffix', context[i - 1][-3:])
+		add('i-2 word', context[i - 2])
+		add('i+1 word', context[i + 1])
+		add('i+1 suffix', context[i + 1][-3:])
+		add('i+2 word', context[i + 2])
+		return features
+
+	def _make_tagdict(self, sentences):
+		'''Make a tag dictionary for single-tag words.'''
+		for words, tags in sentences:
+			for word, tag in zip(words, tags):
+				self.model.classes.add(tag)
+				
+def train(filepath='data/train.txt', model='model/ap.model', nr_iter=1):
+	tagger = Perceptron()
+	print('Reading corpus...')
+	training_data = []
+	sentence = ([], [])
+	fin = open(filepath, 'r', encoding='utf8')
+	for index, line in enumerate(fin):
+		line = line.strip()
+		if line == '':
+			training_data.append(sentence)
+			sentence = ([], [])
+		else:
+			params = line.split()
+			if len(params) != 2: continue
+			sentence[0].append(params[0])
+			sentence[1].append(params[1])
+	fin.close()
+	print('training corpus size : %d', len(training_data))
+	print('Start training...')
+	tagger.train(training_data, save_loc=model, nr_iter=nr_iter)
+
+def eval(filepath='data/test.txt', model='model/ap.model'):
+	tagger = Perceptron(model)
+	
+	print('Start testing...')
+	right = 0.0
+	total = 0.0
+	sentence = ([], [])
+	fin = open(filepath, 'r', encoding='utf8')
+	for index, line in enumerate(fin):
+		line = line.strip()
+		if line == '':
+			words = sentence[0]
+			tags = sentence[1]
+			outputs = tagger.predict(words)
+			assert len(tags) == len(outputs)
+			total += len(tags)
+			for o, t in zip(outputs, tags):
+				if o == t: right += 1
+			sentence = ([], [])
+		else:
+			params = line.split()
+			if len(params) != 2: continue
+			sentence[0].append(params[0])
+			sentence[1].append(params[1])
+	fin.close()
+	print("Precision : %f", right / total)
+	
+def predict(model='model/ap.model'):
+	tagger = Perceptron(model)
+
+	while True:
+		text = input('>')
+		words = list(text)
+		labels = tagger.predict(words)
+		
+		for word, label in zip(words, labels):
+			print(word, label)
+			
+
+if __name__ == '__main__':
+	train()
+	eval()
+	# predict()
+	
+	
+
+	
+	
+	
\ No newline at end of file
diff --git a/jiagu/textrank.py b/jiagu/textrank.py
index 1e469e1..80f8f66 100644
--- a/jiagu/textrank.py
+++ b/jiagu/textrank.py
@@ -1,13 +1,4 @@
 # -*- encoding:utf-8 -*-
-"""
- * Copyright (C) 2017 OwnThink.
- *
- * Name        : textrank.py - 解析
- * Author      : zengbin93 <zeng_bin8888@163.com>
- * Version     : 0.01
- * Description : TextRank算法实现
- special thanks to https://github.com/ArtistScript/FastTextRank
-"""
 import sys
 import numpy as np
 from jiagu import utils
diff --git a/jiagu/utils.py b/jiagu/utils.py
index 304fa9e..286715e 100644
--- a/jiagu/utils.py
+++ b/jiagu/utils.py
@@ -1,16 +1,7 @@
 # -*- encoding:utf-8 -*-
-"""
- * Copyright (C) 2017 OwnThink.
- *
- * Name        : utils.py - 解析
- * Author      : zengbin93 <zeng_bin8888@163.com>
- * Version     : 0.01
- * Description : 常用工具函数
-"""
 import os
 import jiagu
 import math
-import numpy as np
 
 
 def default_stopwords_file():
@@ -138,22 +129,6 @@ def different(scores, old_scores, tol=0.0001):
     return flag
 
 
-def cosine_similarity(vec1, vec2):
-    """计算两个向量的余弦相似度
-
-	:param vec1: list or np.array
-	:param vec2: list or np.array
-	:return: float
-	"""
-    tx = np.array(vec1)
-    ty = np.array(vec2)
-    cos1 = np.sum(tx * ty)
-    cos21 = np.sqrt(sum(tx ** 2))
-    cos22 = np.sqrt(sum(ty ** 2))
-    cosine_value = cos1 / float(cos21 * cos22)
-    return cosine_value
-
-
 def combine(word_list, window=2):
     if window < 2:
         window = 2
diff --git a/setup.py b/setup.py
index f8eda34..b475dac 100644
--- a/setup.py
+++ b/setup.py
@@ -3,16 +3,15 @@
 from setuptools import setup
 
 setup(name='jiagu',
-      version='0.1.8',
+      version='0.1.9',
       description='Jiagu Natural Language Processing',
       author='Yener(Zheng Wenyu)',
       author_email='help@ownthink.com',
       url='https://github.com/ownthink/Jiagu',
       license='MIT',
-      install_requires=['tensorflow==1.6.0', 'numpy>=1.12.1'],
       packages=['jiagu'],
       package_dir={'jiagu': 'jiagu'},
       package_data={'jiagu': ['*.*', 'cluster/*', 'data/*', 'model/*',
-							'normal/*', 'segment/*', 'segment/dict/*',
-							'sentiment/*', 'sentiment/model/*', 'topic/*']}
+					'normal/*', 'segment/*', 'segment/dict/*',
+					'sentiment/*', 'sentiment/model/*', 'topic/*']}
       )
diff --git a/train/perceptron.py b/train/perceptron.py
index 921cee9..346e1b5 100644
--- a/train/perceptron.py
+++ b/train/perceptron.py
@@ -170,6 +170,7 @@ def train(filepath='data/train.txt', model='model/ap.model', nr_iter=1):
 			sentence = ([], [])
 		else:
 			params = line.split()
+			if len(params) != 2: continue
 			sentence[0].append(params[0])
 			sentence[1].append(params[1])
 	fin.close()