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Probabilistic CKY Parser

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Presentation on theme: "Probabilistic CKY Parser"— Presentation transcript:

1 Probabilistic CKY Parser
Book the flight through Houston S :.01, VP:.1, Verb:.5 Nominal:.03 Noun:.1 None NP:.6*.6*.15 =.054 Det:.6 Nominal:.15 Noun:.5 1 1

2 Probabilistic CKY Parser
Book the flight through Houston S :.01, VP:.1, Verb:.5 Nominal:.03 Noun:.1 VP:.5*.5*.054 =.0135 None NP:.6*.6*.15 =.054 Det:.6 Nominal:.15 Noun:.5 2 2

3 Probabilistic CKY Parser
Book the flight through Houston S :.01, VP:.1, Verb:.5 Nominal:.03 Noun:.1 S:.05*.5*.054 =.00135 VP:.5*.5*.054 =.0135 None NP:.6*.6*.15 =.054 Det:.6 Nominal:.15 Noun:.5 3 3

4 Probabilistic CKY Parser
Book the flight through Houston S :.01, VP:.1, Verb:.5 Nominal:.03 Noun:.1 S:.05*.5*.054 =.00135 VP:.5*.5*.054 =.0135 None None NP:.6*.6*.15 =.054 None Det:.6 Nominal:.15 Noun:.5 None Prep:.2 4 4

5 Probabilistic CKY Parser
Book the flight through Houston S :.01, VP:.1, Verb:.5 Nominal:.03 Noun:.1 S:.05*.5*.054 =.00135 VP:.5*.5*.054 =.0135 None None NP:.6*.6*.15 =.054 None Det:.6 Nominal:.15 Noun:.5 None PP:1.0*.2*.16 =.032 Prep:.2 NP:.16 PropNoun:.8 5 5

6 Probabilistic CKY Parser
Book the flight through Houston S :.01, VP:.1, Verb:.5 Nominal:.03 Noun:.1 S:.05*.5*.054 =.00135 VP:.5*.5*.054 =.0135 None None NP:.6*.6*.15 =.054 None Det:.6 Nominal:.15 Noun:.5 Nominal: .5*.15*.032 =.0024 None PP:1.0*.2*.16 =.032 Prep:.2 NP:.16 PropNoun:.8 6 6

7 Probabilistic CKY Parser
Book the flight through Houston S :.01, VP:.1, Verb:.5 Nominal:.03 Noun:.1 S:.05*.5*.054 =.00135 VP:.5*.5*.054 =.0135 None None NP:.6*.6* .0024 = NP:.6*.6*.15 =.054 None Det:.6 Nominal:.15 Noun:.5 Nominal: .5*.15*.032 =.0024 None PP:1.0*.2*.16 =.032 Prep:.2 NP:.16 PropNoun:.8 7 7

8 Probabilistic CKY Parser
Book the flight through Houston S :.01, VP:.1, Verb:.5 Nominal:.03 Noun:.1 S:.05*.5*.054 =.00135 S:.05*.5* = VP:.5*.5*.054 =.0135 None None NP:.6*.6* .0024 = NP:.6*.6*.15 =.054 None Det:.6 Nominal:.15 Noun:.5 Nominal: .5*.15*.032 =.0024 None PP:1.0*.2*.16 =.032 Prep:.2 NP:.16 PropNoun:.8 8 8

9 Probabilistic CKY Parser
Book the flight through Houston S :.01, VP:.1, Verb:.5 Nominal:.03 Noun:.1 S:.05*.5*.054 =.00135 S:.03*.0135* .032 = VP:.5*.5*.054 =.0135 None None S: NP:.6*.6* .0024 = NP:.6*.6*.15 =.054 None Det:.6 Nominal:.15 Noun:.5 Nominal: .5*.15*.032 =.0024 None PP:1.0*.2*.16 =.032 Prep:.2 NP:.16 PropNoun:.8 9 9

10 Probabilistic CKY Parser
Book the flight through Houston S :.01, VP:.1, Verb:.5 Nominal:.03 Noun:.1 S:.05*.5*.054 =.00135 Pick most probable parse, i.e. take max to combine probabilities of multiple derivations of each constituent in each cell. S: VP:.5*.5*.054 =.0135 None None NP:.6*.6* .0024 = NP:.6*.6*.15 =.054 None Det:.6 Nominal:.15 Noun:.5 Nominal: .5*.15*.032 =.0024 None PP:1.0*.2*.16 =.032 Prep:.2 NP:.16 PropNoun:.8 10 10


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