@inproceedings{identifiabilityandunmixingoflatentparse,
  title = {Identifiability and Unmixing of Latent Parse Trees},
  author = {Daniel J. Hsu and Sham M. Kakade and Percy S. Liang},
  year = {2012},
  booktitle = {NeurIPS 2012 12},
  url = {http://papers.nips.cc/paper/4655-identifiability-and-unmixing-of-latent-parse-trees},
}