Predicting lexical answer types in open domain question and answering (QA) systems
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United States of America Patent
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Apr 21, 2015
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Feb 7, 2013
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Jul 18, 2012
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Aug 4, 2011
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Abstract
In an automated Question Answer (QA) system architecture for automatic open-domain Question Answering, a system, method and computer program product for predicting the Lexical Answer Type (LAT) of a question. The approach is completely unsupervised and is based on a large-scale lexical knowledge base automatically extracted from a Web corpus. This approach for predicting the LAT can be implemented as a specific subtask of a QA process, and/or used for general purpose knowledge acquisition tasks such as frame induction from text.
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