The original and the obtained grammar generated exactly the same number of derivation trees in the parsing experiment with 457 sentences from the ATIS corpus ( Marcus et al. , 1994 ) 6 ( the average length is 6.32 words ) .
building a large annotated corpus of english the penn treebank computational linguistics
Mitchell Marcus Beatrice Santorini Mary Ann Marcinkiewicz
Conversion took about 25 minutes CPU time on a 700 Mhz Pentium III Xeon with four gigabytes main memory . The original and the obtained grammar generated exactly the same number of derivation trees in the parsing experiment with 457 sentences from the ATIS corpus ( Marcus et al. , 1994 ) 6 ( the average length is 6.32 words ) . This result empirically attested the strong equivalence of our algorithm .
The original and the obtained grammar generated exactly the same number of derivation trees in the parsing experiment with 457 sentences from the ATIS corpus ( @@CITATION ) 6 ( the average length is 6.32 words ) .