@InProceedings{hara-EtAl:2011:IJCNLP-2011,
  author    = {Hara, Tadayoshi  and  Matsuzaki, Takuya  and  Miyao, Yusuke  and  Tsujii, Jun'ichi},
  title     = {Exploring Difficulties in Parsing Imperatives and Questions},
  booktitle = {Proceedings of 5th International Joint Conference on Natural Language Processing},
  month     = {November},
  year      = {2011},
  address   = {Chiang Mai, Thailand},
  publisher = {Asian Federation of Natural Language Processing},
  pages     = {749--757},
  url       = {http://www.aclweb.org/anthology/I11-1084}
}