Download Advances in Open Domain Question Answering (Text, Speech and by Tomek Strzalkowski, Sanda Harabagiu PDF

By Tomek Strzalkowski, Sanda Harabagiu

This new Springer quantity presents a accomplished and distinctive examine present methods to automatic query answering. the extent of presentation is appropriate for novices to the sphere in addition to for pros wishing to check this region and/or to construct sensible QA structures. The publication can function a "how-to" guide for IT practitioners and process builders. it will possibly even be used to coach graduate classes in desktop technology, details technology and similar disciplines.

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Uses an apposition to describe the designer. An axiom is built to link the head of the noun phrases in the apposition such that they share the same argument: ƒ all x12 x13 x14 x15 x17 x18 x19 (italian_nn(x12) & andrea_nn(x13) & pfister_NN(x14) & nn_nnc(x15,x12,x13,x14) → designer_nn(x15) & of_in(x15, x17) & 1979_nn(x17) & bird_nn(x18) & cage_nn(x19)) Possessives A question/answer substitutes the use of a possessive by using an of or by preposition. ” the candidate answer, “Flying machines, which got off the ground with a 120 - foot flight by the Wright brothers in 1903…” implies ownership using the preposition by to connect the Wright brothers to flight.

Q1404: How many chromosomes does a human zygote have? ] at the 46 chromosomes that lie in the nucleus of every normal human cell without perceiving what has now been discovered. Lexical chains: (1) zygote:n#1 → HYPERNYM → cell:n#1 (2) zygote:n#1 → HYPERNYM → cell:n#1 → HAS_PART → nucleus:n#1 Q1512: What is the age of our solar system? 6 billion years old. Lexical chains: (1) age:n#1 → RGLOSS → aged:a#1 → SIMILAR → old:a#1 Q1570: What is the legal age to vote in Argentina? Answer: Voting is mandatory for all Argentines aged over 18.

SOME ADVANCED FEATURES OF LCC’S POWERANSWER 11 Table 1. Performance over 500 TREC-2002 questions. 9% (98/317). , 2002). The failures of the prover are due primarily to the lack of linguistic axioms. 3. 1 Motivation There are categories of questions for which even complex system modules, like the logic prover described in the previous section, have difficulties extracting precise answers. Questions whose expected answer type does not fall into a well-defined semantic category constitute a challenge to otherwise successful question answering systems.

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