tailieunhanh - Báo cáo khoa học: "Extracting Comparative Sentences from Korean Text Documents Using Comparative Lexical Patterns and Machine Learning Techniques"

This paper proposes how to automatically identify Korean comparative sentences from text documents. This paper first investigates many comparative sentences referring to previous studies and then defines a set of comparative keywords from them. A sentence which contains one or more elements of the keyword set is called a comparative-sentence candidate. Finally, we use machine learning techniques to eliminate non-comparative sentences from the candidates. As a result, we achieved significant performance, an F1-score of , in our experiments using various web documents. . | Extracting Comparative Sentences from Korean Text Documents Using Comparative Lexical Patterns and Machine Learning Techniques Seon Yang Department of Computer Engineering Dong-A University 840 Hadan 2-dong Saha-gu Busan 604-714 Korea syang@ Youngjoong Ko Department of Computer Engineering Dong-A University 840 Hadan 2-dong Saha-gu Busan 604-714 Korea yjko@ Abstract This paper proposes how to automatically identify Korean comparative sentences from text documents. This paper first investigates many comparative sentences referring to previous studies and then defines a set of comparative keywords from them. A sentence which contains one or more elements of the keyword set is called a comparative-sentence candidate. Finally we use machine learning techniques to eliminate non-comparative sentences from the candidates. As a result we achieved significant performance an F1-score of in our experiments using various web documents. 1 Introduction Comparing one entity with other entities is one of the most convincing ways of evaluation Jindal and Liu 2006 . A comparative sentence formulates an ordering relation between two entities and that relation is very useful for many application areas. One key area is for the customers. For example a customer can make a decision on his her final choice about a digital camera after reading other customers product reviews . Digital Camera X is much cheaper than Y though it functions as good as Y Another one is for manufacturers. All the manufacturers have an interest in the articles saying how their products are compared with competitors ones. Comparative sentences often contain some comparative keywords. A sentence may express some comparison if it contains any comparative keywords such as MỢ bo-da than JIS ga-jang most S da-reu different gat same . But many sentences also express comparison without those keywords. Similarly although some sentences contain some keywords they cannot be comparative sentences.