Xia ( 1999 ) also presents a similar method for the extraction of a TAG from the Penn Treebank .
extracting tree adjoining grammars from bracketed corpora
Fei Xia
The number of frame types extracted ( i.e. , an elementary tree without a specific lexical anchor ) ranged from 2,366 to 8,996 . Xia ( 1999 ) also presents a similar method for the extraction of a TAG from the Penn Treebank . The extraction procedure consists of three steps : First , the bracketing of the trees in the Penn Treebank is corrected and extended based on the approaches of Magerman ( 1994 ) and Collins ( 1997 ) .
@@CITATION also presents a similar method for the extraction of a TAG from the Penn Treebank .