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Exploring models for semantic category verification
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DOI：10.1016/j.is.2009.03.007.png)
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Many artificial intelligence tasks, such as automated question answering, reasoning, or heterogeneous database integration, involve verification of a semantic category (e.g. coffee is a drink, red is a color, while steak is not a drink and big is not a color). In this research, we explore completely automated on-the-fly verification of a membership in any arbitrary category which has not been expected a priori. Our approach does not rely on any manually codified knowledge (such as WordNet or Wikipedia) but instead capitalizes on the diversity of topics and word usage on the World Wide Web, thus can be considered knowledge-light and complementary to the knowledge-intensive approaches. We have created a quantitative verification model and established (1) what specific variables are important and (2) what ranges and upper limits of accuracy are attainable. While our semantic verification algorithm is entirely self-contained (not involving any previously reported components that are beyond the scope of this paper), we have tested it empirically within our fact seeking engine on the well known TREC conference test questions. Due to our implementation of semantic verification, the answer accuracy has improved by up to 16% depending on the specific models and metrics used. (c) 2009 Elsevier B.V. All rights reserved.
Keyword:
Semantic category verification
Automated question answering
Text mining
World wide web
Search engines
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