@inproceedings{ambiguityawareensembletrainingforsemi,
  title = {Ambiguity-aware Ensemble Training for Semi-supervised Dependency Parsing},
  author = {Zhenghua Li and Min Zhang and Wenliang Chen},
  year = {2014},
  booktitle = {ACL 2014 6},
  url = {https://aclanthology.org/P14-1043},
}