Abstract
Question Answering, the process of extracting answers to natural language questions is profoundly different from Information Retrieval (IR) or Information Extraction (IE). IR systems allow us to locate relevant documents that relate to a query, but do not specify exactly where the answers are. In IR, the documents of interest are fetched by matching query keywords to the index of the document collection. By contrast, IE systems extract the information of interest provided the domain of extraction is well defined. In IE systems, the information of interest is in the form of slot fillers of some predefined templates.
The QA technology takes both IR and IE a step further, and provides specific and brief answers to open domain questions formulated naturally. This paper presents the major modules used to build IR, IE and QA systems and Shows similarities, differences and possible trade-offs between the three technologies.
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References
Brill, E., Lin, J., Bnako, M., Dumais, S., Ng, A.: Data-Intensive Question Answering. In: Proceedings of the TREC-9 (2000)
Clarke, C.L.A., Cormack, G.V., Kisman, D.I.E., Lynam, T.R.: Question Answering by Passage Selection (MultiText Experiments for TREC-9). In: Proceedings of the TREC-9 (2000)
Harabagiu, S., Pasca, M., Maiorano, S.: Experiments with open-domain textual question answering. In: Proceedings of the 18th International Conference on Computational Linguists, COLING 2000 (2000)
Harabagiu, S., Moldovan, D., Pasca, M., Mihalcea, R., Surdeanu, M., Bunescu, R., Girju, R., Rus, V., Morarescu, P.: FALCON: Boosting Knowledge for Answer Engines. In: Proceedings of the TREC-9 (2000)
Harabagiu, S., Moldovan, D., Pasca, M., Surdeanu, M., Mihalcea, R., Girju, R., Rus, V., Lacatusu, F., Morarescu, P., Bunescu, R.: Answering complex, list, and context questions with LCC’s question answering server. In: Proceedings of the 10th Text REtrievai Conference, TREC 2001 (2001)
Harabagiu, S., Surdeanu, M.: Infrastructure for Open-Domain Information Extraction. In: Proceedings of Human Language Technology 2002, HLT 2002 (2002)
Hobbs, J., Appelt, D., Bear, J., Israel, D., Kameyama, M., Stickel, M., Tyson, M.: FASTUS: A cascaded finite-state transducer for extracting information from natural-language text. In: Finite State Devices for Natural Language Processing (1996)
Hovy, E., Hermjakob, U., Lin, C.-Y., Junk, M., Gerber, L.: The Webclopedia. In: Proceedings of the TREC-9 (2000)
Ittycheriah, A., Franz, M., Roukos, S.: IBM’s Statistical Question Answering System. In: Proceedings of the TREC 2001 (2001)
Kwok, K.L., Grunfeld, L., Dinsti, N., Chan, M.: TREC-9 Cross Language, Web and Question Answering Track Experiments using PIRCS. In: Proceedings of the TREC-9 (2000)
Language Computer Corporation web site: languagecomputer.com
Mihalcea, R., Moldovan, D.: Semantic Indexing using WordNet Senses. In: Proceedings of ACL-2001 Workshop on Recent Advances in Natural Language Processing and Information Retrieval, Hong Kong (2000)
Moldovan, D., Harabagiu, S., Pasca, M., Mihalcea, R., Goodrum, R., Girju, R., Rus, V.: LASSO: A Tool for Surfing the Answering Net. In: Proceedings of the Eight Text REtrieval Conference (TREC 8), National Institute of Standards and Technology (1999)
Moldovan, D., Rus, V.: Logic Form Transformation of WordNet and its Applicability to Question Answering. In: Proceedings of the ACL (2001)
Moldovan, D., Pasca, M., Harabagiu, S., Surdeanu, M.: Performance Issues and Analysis in an Open-Domain Question Answering System. In: Proceedings of the ACL (2002) (Error)
Pasca, M., Harabagiu, S.: The informative role of Word- Net in open-domain question answering. In: Proceedings of the 2nd Meeting of the North American Chapter of the Association for Computationai Linguistics, NAACL 2001 (2001)
Soubbotin, M.M., Soubbotin, S.M.: Patterns of Potential Answer Expressions as Clues to the Right Answers. In: Proceedings of the TREC 2001 (2001)
Srihari, R., Li, W.: Information Extraction Supported Question Answering. In: Proceedings of the TREC-8 (1999)
Sullivan, D.: Search engine sizes. searchenginewatch.com (November 2000)
Voorhees, E.: The TREC-8 Question Answering track report. In: Proceedings of the 8th Text REtrieval Conference, TREC-8 (1999)
Voorhees, E.M.: Overview of the TREC 2001 Question Answering Track. In: Proceedings of the TREC 2001 (2001)
Woods, W.A.: Conceptual Indexing: A Better Way to Organize Knowledge. Technical Report SMLI TR-97-61, Sun Microsystems Labs, Mountain View, CA (1997)
Woods, W.A., Green, S., Martin, P., Houston, A.: Halfway to Question Answering. In: Proceedings of the TREC-9 (2000)
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Moldovan, D., Surdeanu, M. (2003). On the Role of Information Retrieval and Information Extraction in Question Answering Systems. In: Pazienza, M.T. (eds) Information Extraction in the Web Era. SCIE 2002. Lecture Notes in Computer Science(), vol 2700. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-45092-4_6
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DOI: https://doi.org/10.1007/978-3-540-45092-4_6
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