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Title: Semantic Networks and Spreading Activation Process for QA improvement on text answers
Authors: Saias, José
Quaresma, Paulo
Editors: Caseli, Helena
Specia, Lucia
Keywords: question-answering systems
Issue Date: Oct-2011
Publisher: SBC - Sociedade Brasileira de Computação
Citation: José Saias and Paulo Quaresma. Semantic networks and spreading activation process for QA improvement on text answers. In Proceedings of the 8th Brazilian Symposium in Information and Human Language Technology - STIL2011, Mato Grosso, Brasil, 2011.
Abstract: Question Answering (QA) systems try to find precise answers to natural language questions. QA extraction result is often an amount of text candidate answers which requires some validation and ranking criteria. This paper presents an automatic answer appreciation technique where extracted candidate answers are represented in a question dedicated associative knowledge base, a semantic network. A spreading activation algorithm looks for semantically related candidate answers, that reinforce each other. The purpose is to enhance the best answers by rising their weight. This article concludes with evaluation details for an experiment with text answers to Portuguese questions.
ISSN: 2175-6201
Type: article
Appears in Collections:INF - Artigos em Livros de Actas/Proceedings

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