Chinese Comparative Sentences Identification and Comparative Elements Extraction Based on Semantic Classification

Comparison is a common expression to assess which is better or whether they are identical(or similar)in some aspects among several things.How to identify comparative sentences and extract the elements being compared automatically is a novel and practical research in the sentiment analysis field.Based on the interdependent relationship between comparative sentences and comparative elements,we propose a method to accomplish the two identification tasks simultaneously.According to the semantic classification of words and comparative sentences,we construct the lexicon system consisting of a domain lexicon,a sentiment lexicon,a mark lexicon and a common lexicon,and them build a rule base of comparative sentences identification and comparative elements extraction.On the testing corpus published by The Fourth Chinese Opinion Analysis Evaluation(COAE2012),the experiments demonstrate a promising.e.evaluation)result by the proposed method.