Abstract
Question Answering (QA) aims at providing users with short text units that answer specific, well-formed natural language questions. A two stage architecture is widely adopted for this task consisting of a document retrieval step followed by an answer extraction step. In such an approach two main problems need to be addressed to reduce the search space: better selecting answer bearing passages in the document retrieval step and better pinpointing answers in the answer extraction step. We investigate the effect of word-based and linguistic-based features for the identification of answer-bearing sentences and answer candidates in a QA system and show that both play a significant role.
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© 2006 Springer-Verlag Berlin Heidelberg
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Saggion, H., Gaizauskas, R. (2006). Experiments in Passage Selection and Answer Identification for Question Answering. In: Salakoski, T., Ginter, F., Pyysalo, S., Pahikkala, T. (eds) Advances in Natural Language Processing. FinTAL 2006. Lecture Notes in Computer Science(), vol 4139. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11816508_30
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DOI: https://doi.org/10.1007/11816508_30
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-37334-6
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