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CS4705 Natural Language Processing Fall 2009

CS4705 Natural Language Processing Fall 2009. What will we study in this course?. How can machines recognize and generate text and speech? Human language phenomena Theories, often drawn from linguistics, psychology Algorithms Applications. Syntax. Word Order John hit Bill

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CS4705 Natural Language Processing Fall 2009

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  1. CS4705 Natural Language Processing Fall 2009

  2. What will we study in this course? • How can machines recognize and generate text and speech? • Human language phenomena • Theories, often drawn from linguistics, psychology • Algorithms • Applications

  3. Syntax • Word Order • John hit Bill • Bill was hit by John • Bill hit John • Bill, John hit • Who John hit was Bill

  4. Semantics • Word meaning • John picked up a bad cold. • John picked up a large rock. • John picked up Radio Netherlands on his radio.

  5. Pragmatics – The influence of context “Going Home'' - A play in one act • Scene 1: Pennsylvania Station, NY • Bonnie: Long Beach? • Passerby: Downstairs, LIRR Station.

  6. Scene 2: Ticket Counter, LIRR Station • Bonnie: Long Beach? • Clerk: $4.50.

  7. Current Real World Applications Searching very large text and speech corpora: e.g. the Web Question answering over the web Translating between one language and another: e.g. Arabic and English Summarizing very large amounts of text: e.g. your email, the news Dialogue systems: e.g. Amtrak’s ‘Julie’

  8. Instructor • Kathy McKeown • Office: 722 CEPSR • Head NLP Group • 25 years at Columbia, Department Chair for 6 • Research • Summarization • Question Answering • Language Generation • Multimedia Explanation

  9. Logistics • Instructor: Kathy McKeown • (kathy@cs.columbia.edu) • Office and hours: CEPSR 722, Tues 4-5, Wed 4-5 • Syllabus available at http://www.cs.columbia.edu/~kathy/NLP

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