These disadvantages are a consequence of failing to exploit the generalisations that CCG combinators define.
one interesting comparison is between the PTB parser of Petrov and Klein (2007) Clark and Curran (2007) 90.9 85.5 88.8 Fowler and Penn (2010) 90.9 86.0 89.3 Auli and Lopez (2011) 91.7 86.2 89.5 Native PTB Klein and Manning (2003) 89.8 85.8 - Petrov and Klein (2007) 93.6 90.1 - Charniak and Johnson (2005) 94.8 91.5 - Table 5: F-scores on section 23 for PTB parsers and CCG parsers with their output converted by our method.