Natural Language Processing Grammar: CFG, Treebanks & Dependency. Meeting 12, Oct 9, 2012 Rodney Nielsen Most of these slides were adapted from James Martin. Today 10/9/2012. Moving from words to bigger units Syntax and Grammars Context-free grammars Grammars for English Treebanks
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Natural Language ProcessingGrammar: CFG, Treebanks & Dependency
Meeting 12, Oct 9, 2012
Most of these slides were adapted from James Martin
Moving from words to bigger units
Syntax and Grammars
S NP VP
S Aux NP VP
S WH-NP Aux NP VP
NP Det Nominal
Sneezed the book is a VP since “sneeze” is a verb and “the book” is a valid NP
Possible solution for agreement.
Can use the same trick for all the verb/VP classes.
SgS -> SgNP SgVP
PlS -> PlNp PlVP
SgNP -> SgDet SgNom
PlNP -> PlDet PlNom
PlVP -> PlV NP
SgVP ->SgV Np
They hid the letter on the shelf