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...as expressed on the web. This can be thought of as a kind of information extraction (see, e.g., [11, [41, [101, [81, [91, [7] or as a kind of questionanswering (see e.g., [13],[6],[17],[22],[23],[12],=-=[18]-=-,[19],[25]), both of which have extensively been explored in the field of web text retrieval. The purpose of this paper is to provide a general new framework for automatically collecting and analyzing...

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...antic – to match semantically related words in the question or the answer context). The authors show that the overall precision became more than double when PWN use was integrated into the system. In =-=[71]-=-, [36] PWN is used to parse answers from paragraphs that had been identified to contain the question keywords. Together with gazetteers, WN helps in configuring heuristic rules for the recognition of ...

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...r is asking. Some previous work in automated question answering has categorized questions by question word or by a mixture of question word and the semantic class of the answer (Srihari and Li, 2000; =-=Moldovan et al., 2000-=-). To ensure full coverage of all forms of simple question and answer, and to be able to factor in deviations and special requirements, we are developing a QA Typology. We motivate the Typology (a tax...

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...g systems typically employ a single pipeline architecture, consisting roughly of three components: question analysis, search, and answer selection (see e.g., (Clarke et al., 2001a; Hovy et al., 2000; =-=Moldovan et al., 2000-=-; Prager et al., 2000)). The knowledge sources utilized by these systems to date primarily focus on the corpus from which answers are to be retrieved, WordNet, and the Web (see e.g., (Clarke et al., 2...

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...he question (e.g. h: ‘X invented the PC’ for “Who invented the PC?”). Thus, cpg(h) can be constructed with respect to the question’s focus while cpv(h) may be generated from the expected answer type (=-=Moldovan et al., 2000-=-; Harabagiu et al., 2003). Construction of hypotheses’ CP for IE is demonstrated in Section 4. 3 Contextual Preferences Models This section presents the current models that we implemented for the vari...

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...as search engines or automated customer support. 1.2 Motivation The work presented in this paper builds upon the previous work in question answering systems performed at Southern Methodist University =-=[27, 26, 16]-=-. At the only two editions of the TREC competition that had a Q/A track (TREC-8 in 1999 and TREC-9 in 2000), the Q/A systems developed at SMU were ranked first. The distributed Q/A system introduced i...

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...slowly diversified question types, increased question complexity, and refined evaluation metrics - as reflected by the TREC QA track (Voorhees, 2003). Starting from successful pipeline architectures (=-=Moldovan et al., 2000-=-; Hovy et al., 2000), QA systems have responded to changes in the nature of the QA task by incorporating knowledge resources (Hermjakob et al., 2000; Hovy et al., 2002), handling additional types of q...