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

By Tomek Strzalkowski, Sanda Harabagiu

This new Springer quantity offers a finished and precise examine present techniques to computerized query answering. the extent of presentation is appropriate for rookies to the sphere in addition to for pros wishing to check this zone and/or to construct functional QA structures. The booklet can function a "how-to" instruction manual for IT practitioners and process builders. it may even be used to coach graduate classes in desktop technology, info technology and comparable disciplines.

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Intelligence has concerns about Osama bin Laden acquiring nuclear weapons or radioactive material that could be turned into a weapon, but they have no concrete evidence he has done so, officials said Wednesday Answer w/ onto: The article says that bin Laden may have tried to purchase nuclear weapons in Russia after reading reports that lax security in the former Soviet nuclear weapons complex. SOME ADVANCED FEATURES OF LCC’S POWERANSWER 23 5. 1 Motivation The design of complex algorithms and the addition of advanced features to stateof-the-art QA systems lead to the goal of extracting more accurate answers from large document collections.

Question Sentence answer (exact answer shown in italics; not minimal if marked as *) What are chloroplasts? Photosynthesis occurs in chloroplasts, the tiny structures in plant cells that contain chlorophyll What is a micron? What is viscosity? A micron is a millionth of a meter, about one-hundredth the thickness of a human hair Magma that is 65 percent to 75 percent silica has silica-rich molecules which tend to chain together and drastically increase the resistance to flow*, or viscosity 17 SOME ADVANCED FEATURES OF LCC’S POWERANSWER Table 8.

Search engines return hyperlinks to full-length Web documents, possibly accompanied by a document fragment in which keywords are highlighted. To actually find relevant information, users must read the first documents. Even if relevant information is inside the first hit returned, finding it can still be time-consuming if the document is very long. QA systems act as advanced interfaces for Web searching, permitting users to use natural language and thus concentrate on what they are actually looking for, rather than on the artificial constraints imposed by a particular syntax.

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