(2006) have shown that BLEU does not always rank competing systems in accord with human judgments, but also because surface realization scores are typically much higher than those in MT-where BLEU's performance has been repeatedly assessed-even when using just one reference.
for a both the original CCGbank and the collapsed corpus, we extracted a section 02-21 lexicogrammars and used it to derive Lfs for the development and test sections.