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versión On-line ISSN 1870-9044

Polibits  no.43 México ene./jun. 2011


Semantic Aspect Retrieval for Encyclopedia


Chao Han, Yicheng Liu, Yu Hao, and Xiaoyan Zhu


Department of Computer Science and Technology, Tsinghua University, China (e–mail:


Manuscript received November 1, 2010.
Manuscript accepted for publication December 21, 2010.



With the development of Web 2.0, more and more people contribute their knowledge to the Internet. Many general and domain–specific online encyclopedia resources become available, and they are valuable for many Natural Language Processing (NLP) applications, such as summarization and question–answering. We propose a novel encyclopedia–specific method to retrieve passages which are semantically related to a short query (usually comprises of only one word/phrase) from a given article in the encyclopedia. The method captures the expression word features and categorical word features in the surrounding snippets of the aspect words by setting up massive hybrid language models. These local models outperform the global models such as LSA and ESA in our task.

Key words: Aspect retrieval, online encyclopedia, semantic relatedness.





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