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Dependency Parsing as a Classification Problem

Dependency Parsing as a Classification Problem. Deniz Yuret Ko ç University İstanbul. L inking Adjacent Words. kick the red ball. ?. ?. ?. L inking Adjacent Words. kick the red ball. L inking Adjacent Words. kick the red ball. ?. ?. L inking Adjacent Words. kick the red ball. ?.

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Dependency Parsing as a Classification Problem

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  1. Dependency Parsing as a Classification Problem Deniz Yuret Koç University İstanbul

  2. Linking Adjacent Words kick the red ball ? ? ?

  3. Linking Adjacent Words kick the red ball

  4. Linking Adjacent Words kick the red ball ? ?

  5. Linking Adjacent Words kick the red ball ? ? ?

  6. Linking Adjacent Words kick the red ball

  7. Linking Adjacent Words kick the red ball ? ? ? ?

  8. Linking Adjacent Words kick the red ball ? ? ?

  9. Linking Adjacent Words kick the red ball ? ?

  10. Linking Adjacent Words kick the red ball

  11. Percentage of adj words linked

  12. Sample decision list for German • If XL1:postag=APPR Then NONE • If X:postag=ART, Y:postag=NN Then L:NK • If X:postag=APPR Then R:NK • If TRUE Then NONE

  13. Sample decision list for German • If XL1:postag=APPR Then NONE • If X:postag=ART, Y:postag=NN Then L:NK • If X:postag=APPR Then R:NK • If TRUE Then NONE APPR-ART-NN

  14. Attribute Selection

  15. Accuracy on adj word links

  16. Contributions • Learning adjacent word dependencies using decision lists and GPA. • Accuracy on adjacent word dependencies between 85%-95% for most languages. • Greedy bottom-up parsing model did not work very well.

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