The use of logic in question answering (QA) promises better accuracy of results, better utilization of the document collection, and a straightforward solution for integrating background knowledge. However, the brittleness of the logical approach still hinders its breakthrough into applications. Several proposals exist for making logic-based QA more robust against erroneous results of linguistic analysis and against gaps in the background knowledge: Extracting useful information from failed proofs, embedding the prover in a relaxation loop, and fusion of logic-based and shallow features using machine learning (ML). In the paper, we explore the effectiveness of these techniques for logic-based passage filtering in the LogAnswer question answering system. An evaluation on factual question of QA@CLEF07 reveals a precision of 54.8% and recall of 44.9% when relaxation results for two distinct provers are combined. © 2008 Springer-Verlag Berlin Heidelberg.
CITATION STYLE
Glöckner, I., & Pelzer, B. (2008). Exploring robustness enhancements for logic-based passage filtering. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 5177 LNAI, pp. 606–614). Springer Verlag. https://doi.org/10.1007/978-3-540-85563-7_77
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