Select all other words dan jurafsky choosing keywords

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Unformatted text preview: using a rich set of features. •  features include those hand ­wrioen rules! 28 Dan Jurafsky Features for Answer Type Detec%on •  •  •  •  •  29 Ques+on words and phrases Part ­of ­speech tags Parse features (headwords) Named En++es Seman+cally related words Dan Jurafsky Factoid Q/A Document Document Document Document Document Document Answer Indexing Passage Retrieval Question Processing Question Query Formulation Answer Type Detection 30 Document Retrieval Docume Docume nt Docume nt Docume nt Docume nt Relevant nt Docs Passage Retrieval passages Answer Processing Dan Jurafsky Keyword Selec%on Algorithm Dan Moldovan, Sanda Harabagiu, Marius Paca, Rada Mihalcea, Richard Goodrum, Roxana Girju and Vasile Rus. 1999. Proceedings of TREC ­8. 1. Select all non ­stop words in quota+ons 2. Select all NNP words in recognized named en++es 3. Select all complex nominals with their adjec+val modifiers 4. Select all other complex nominals 5. Select all nouns with their adjec+val modifiers 6. Select all other nouns 7. Select all verbs 8. Select all adverbs 9. Select the QFW word (skipped in all previous steps) 10. Select all other words Dan Jurafsky Choosing keywords from the query Slide from Mihai Surdeanu Who coined the term “cyberspace” in his novel “Neuromancer”? 1 4 1 4 7 cyberspace/1 Neuromancer/1 term/4 novel/4 coined/7 32 Question Answering Answer Types and Query Formula+on Question Answering Passage Retrieval and Answer Extrac+on Dan Jurafsky Factoid Q/A Document Document Document Document Document Document Answer Indexing Passage Retrieval Question Processing Question Query Formulation Answer Type Detection 35...
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This document was uploaded on 02/14/2014.

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