@conference {citation166,
	title = {The infinite PCFG using Dirichlet processes},
	booktitle = {Empirical Methods in Natural Language Processing (EMNLP)},
	year = {2007},
	month = {2007},
	address = {Prague, Czech Republic},
	url = {http://www.aclweb.org/anthology-new/D/D07/D07-1072.pdf},
	author = {P. Liang and S. Petrov and D. Klein and M. Jordan}
}
