Transcription of CHAPTER 23 Question Answering - Stanford University
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CHAPTER 23 Question Answering - Stanford University
Speech and Language Processing. Daniel Jurafsky & James H. Martin. Copyright 2021. All rights reserved. Draft of December 29, 2021. CHAPTER . Question Answering 23. The quest for knowledge is deeply human, and so it is not surprising that practi- cally as soon as there were computers we were asking them questions. By the early 1960s, systems used the two major paradigms of Question Answering information- retrieval-based and knowledge-based to answer questions about baseball statis- tics or scientific facts. Even imaginary computers got into the act. Deep Thought, the computer that Douglas Adams invented in The Hitchhiker's Guide to the Galaxy, managed to answer the Ultimate Question Of Life, The Universe, and Everything .1. In 2011, IBM's Watson Question - Answering system won the TV game-show Jeop- ardy!
engine, or querying a database. Most question answering systems focus on a par-ticular subset of these information needs: factoid questions, questions that can be answered with simple facts expressed in short texts, like the following: (23.1)Where is the Louvre Museum located? (23.2)What is the average age of the onset of autism?
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