TAILIEUCHUNG - Báo cáo khoa học: "Methods for Using Textual Entailment in Open-Domain Question Answering"

Work on the semantics of questions has argued that the relation between a question and its answer(s) can be cast in terms of logical entailment. In this paper, we demonstrate how computational systems designed to recognize textual entailment can be used to enhance the accuracy of current open-domain automatic question answering (Q/A) systems. | Methods for Using Textual Entailment in Open-Domain Question Answering Sanda Harabagiu and Andrew Hickl Language Computer Corporation 1701 North Collins Boulevard Richardson Texas 75080 USA sanda@ Abstract Work on the semantics of questions has argued that the relation between a question and its answer s can be cast in terms of logical entailment. In this paper we demonstrate how computational systems designed to recognize textual entailment can be used to enhance the accuracy of current open-domain automatic question answering Q A systems. In our experiments we show that when textual entailment information is used to either filter or rank answers returned by a Q A system accuracy can be increased by as much as 20 overall. 1 Introduction Open-Domain Question Answering Q A systems return a textual expression identihed from a vast document collection as a response to a question asked in natural language. In the quest for producing accurate answers the open-domain Q A problem has been cast as 1 a pipeline of linguistic processes pertaining to the processing of questions relevant passages and candidate answers interconnected by several types of lexico-semantic feedback cf. Harabagiu et al. 2001 Moldovan et al. 2002 2 a combination of language processes that transform questions and candidate answers in logic representations such that reasoning systems can select the correct answer based on their proofs cf. Moldovan et al. 2003 3 a noisy-channel model which selects the most likely answer to a question cf. Echi-habi and Marcu 2003 or 4 a constraint satisfaction problem where sets of auxiliary questions are used to provide more information and better constrain the answers to individual questions cf. Prager et al. 2004 . While different in their approach each of these frameworks seeks to approximate the forms of semantic inference that will allow them to identify valid textual answers to natural language questions. Recently the task of automatically .

TÀI LIỆU MỚI ĐĂNG
65    142    1    29-12-2024
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.