LING 581: Advanced Computational Linguistics

1. LING 581: Advanced Computational Linguistics Lecture Notes March 6th

2. Today’s Topic • Applications of Wordnet

3. Today’s Topic WordNet • Did everyone manage to install? • WordNet 3.0 package • wnb (WordNet browser) • export PATH=/usr/local/WordNet-3.0/bin:$PATH • WordNet::QueryData Perl Module Need them to do your homework (out today)

4. bfs code • Use my breadth-first search Perl code as a starting point (previous lecture) or roll your own … • you’ll need to map word into word#pos#sense, e.g.

5. Word Smart for the GRE

6. Word Smart for the GRE

7. Homework • Task: use Wordnet to determine which words best match which definitions? • (Quiz 4 from Word Smart for the GRE) • Left column (word): right column (definition)

8. Homework • Task: use Wordnet to determine which words best match which definitions? • (Quiz 7 from Word Smart for the GRE) • Left column (word): right column (definition)

9. Homework • Task: use Wordnet to determine which words best match which definitions? • (Quiz 22 from Word Smart for the GRE)

10. Homework • Write a program that automatically matches up words with definitions for the 3 quizzes. • Report your results (make slides) • Explain the heuristics you chose • For cases that don’t work, explain why? • Is it your algorithm? Is it WordNet? … • Conclusion: • is Wordnetadequate to the task of connecting up the words with the definitions?

11. WordNet’s Semantic Relations

12. Example • Word: • cadge • brook • cacophony • Definition: • mooch • tolerate • discordant sound same synset cadge hype obtain hype get hypo buy enta pay deriv payer deriv pay hype tolerate brookhype permit hypeaccept deriacceptation deriaccept hype get hypoobtainhypomooch#v#1 same synset cadge hype beg hyperequesthype communicatederi communication hypoauditory_communicationhyposound brook hypepermit hypeaccept hypoagree deriagreement hypo accord deriaccordant antsdiscordan brook hypestream hypebody_of_waterhypo sound cacophony hypedissonance hypesound_propertyhypeproperty hypostrength hypoendurance deri tolerate cacophony hype dissonance deridiscordant cacophony hype noise hype sound

13. Measuring Similarity Requires installing WordNet::QueryData first

14. Using WordNet: Example

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22. Semantic Bleaching

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40. Logical Metonomy

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