Compiling Language Models from a Linguistically Motivated Unification   Grammar
  Systems now exist which are able to compile unification grammars into language models that can be included in a speech recognizer, but it is so far unclear whether non-trivial linguistically principled grammars can be used for this purpose. We describe a series of experiments which investigate the question empirically, by incrementally constructing a grammar and discovering what problems emerge when successively larger versions are compiled into finite state graph representations and used as language models for a medium-vocabulary recognition task. 
Manny Rayner, Beth Ann Hockey, Frankie James, Elizabeth O. Bratt,   Sharon Goldwater, Mark Gawron