Abstract
The German question answering (QA) system IRSAW (formerly: InSicht) participated in QA@CLEF for the fifth time. IRSAW was introduced in 2007 by integrating the deep answer producer InSicht, several shallow answer producers, and a logical validator. InSicht builds on a deep QA approach: it transforms documents to semantic representations using a parser, draws inferences on semantic representations with rules, and matches semantic representations derived from questions and documents. InSicht was improved for QA@CLEF 2008 mainly in the following two areas. The coreference resolver was trained on question series instead of newspaper texts in order to be better applicable for follow-up questions. Questions are decomposed by several methods on the level of semantic representations. On the shallow processing side, the number of answer producers was increased from two to four by adding FACT, a fact index, and SHASE, a shallow semantic network matcher. The answer validator introduced in 2007 was replaced by the faster RAVE validator designed for logic-based answer validation under time constraints. Using RAVE for merging the results of the answer producers, monolingual German runs and bilingual runs with source language English and Spanish were produced by applying the machine translation web service Promt. An error analysis shows the main problems for the precision-oriented deep answer producer InSicht and the potential offered by the recall-oriented shallow answer producers.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Hartrumpf, S.: Coreference resolution with syntactico-semantic rules and corpus statistics. In: Proceedings of the Fifth Computational Natural Language Learning Workshop (CoNLL 2001), Toulouse, France, pp. 137–144 (2001)
Harabagiu, S.: Questions and intentions. In: Strzalkowski, T., Harabagiu, S. (eds.) Advances in Open Domain Question Answering. Text, Speech and Language Technology, vol. 32, pp. 99–147. Springer, Dordrecht (2006)
Hartrumpf, S.: Semantic decomposition for question answering. In: Ghallab, M., Spyropoulos, C.D., Fakotakis, N., Avouris, N. (eds.) Proceedings of the 18th European Conference on Artificial Intelligence (ECAI), Patras, Greece, pp. 313–317 (2008)
Leveling, J.: On the role of information retrieval in the question answering system IRSAW. In: Proceedings of the LWA 2006 (Learning, Knowledge, and Adaptability), Workshop Information Retrieval, pp. 119–125. Universität Hildesheim, Hildesheim (2006)
Leveling, J.: A modified information retrieval approach to produce answer candidates for question answering. In: Hinneburg, A. (ed.) Proceedings of the LWA 2007 (Lernen-Wissen-Adaption), Workshop FGIR. Gesellschaft für Informatik, Halle/Saale, Germany (2007)
Hengel, C., Pfeifer, B.: Kooperation der Personennamendatei (PND) mit Wikipedia. Dialog mit Bibliotheken 17(3), 18–24 (2005)
Helbig, H.: Knowledge Representation and the Semantics of Natural Language. Springer, Berlin (2006)
Glöckner, I.: University of Hagen at QA@CLEF 2008: Answer validation exercise. In: Results of the CLEF 2008 Cross-Language System Evaluation Campaign, Working Notes for the CLEF 2008 Workshop, Aarhus, Denmark (2008)
Hartrumpf, S., Glöckner, I., Leveling, J.: University of Hagen at QA@CLEF 2008: Efficient question answering with question decomposition and multiple answer streams. In: Results of the CLEF 2008 Cross-Language System Evaluation Campaign, Working Notes for the CLEF 2008 Workshop, Aarhus, Denmark (2008)
Leveling, J., Hartrumpf, S.: Integrating methods from IR and QA for geographic information retrieval. In: Peters, C., et al. (eds.) CLEF 2008. LNCS, vol. 5706, pp. 851–854. Springer, Heidelberg (2009)
Hartrumpf, S.: Question answering using sentence parsing and semantic network matching. In: Peters, C., Clough, P., Gonzalo, J., Jones, G.J.F., Kluck, M., Magnini, B. (eds.) CLEF 2004. LNCS, vol. 3491, pp. 512–521. Springer, Heidelberg (2005)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2009 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Hartrumpf, S., Glöckner, I., Leveling, J. (2009). Efficient Question Answering with Question Decomposition and Multiple Answer Streams. In: Peters, C., et al. Evaluating Systems for Multilingual and Multimodal Information Access. CLEF 2008. Lecture Notes in Computer Science, vol 5706. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-04447-2_49
Download citation
DOI: https://doi.org/10.1007/978-3-642-04447-2_49
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-04446-5
Online ISBN: 978-3-642-04447-2
eBook Packages: Computer ScienceComputer Science (R0)