This approach has now gained wide usage , as exemplified by the work of Collins ( 1996 , 1999 ) , Charniak ( 1996 , 1997 ) , Johnson ( 1998 ) , Chiang ( 2000 ) , and many others .
a new statistical parser based on bigram lexical dependencies
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The DOP model , on the other hand , was the first model ( to the best of our knowledge ) that proposed not to train a predefined grammar on a corpus , but to directly use corpus fragments as a grammar . This approach has now gained wide usage , as exemplified by the work of Collins ( 1996 , 1999 ) , Charniak ( 1996 , 1997 ) , Johnson ( 1998 ) , Chiang ( 2000 ) , and many others . The other innovation of DOP was to take ( in principle ) all corpus fragments , of any size , rather than a small subset .
This approach has now gained wide usage , as exemplified by the work of @@CITATION , 1999 ) , Charniak ( 1996 , 1997 ) , Johnson ( 1998 ) , Chiang ( 2000 ) , and many others .