leksička semantika i pragmatika 4. predavanje. question answering what does “door” mean? what...
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Leksička semantika i pragmatika
4. predavanje
Question Answering
• What does “door” mean?• What year was Abraham Lincoln born?• How many states were in the United
States when Lincoln was born?• Was there a military draft during the
Hoover administration?• What do US scientists think about whether
human cloning should be legal?
Modern QA systems
• Still in infancy• Simple factoid questions beginning to work
OK• Annual government-sponsored “bakeoff”
called TREC
• Ambiguity!
• World Knowledge – it’s needed for understanding, but computers don’t have it
NLP 4
Ambiguity
• Computational linguists are obsessed with ambiguity
• Ambiguity is a fundamental problem of computational linguistics
• Resolving ambiguity is a crucial goal
Ambiguity
• Find at least 5 meanings of this sentence:– I made her duck
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