@inproceedings{xu2013preliminary,
  title={A Preliminary Study of Tweet Summarization using Information Extraction},
  author={Xu, Wei and Grishman, Ralph and Meyers, Adam and Ritter, Alan},
  booktitle={Proceedings of the Workshop on Language Analysis in Social Media (LASM)},
  month     = {June},
  year      = {2013},
  address   = {Atlanta, Georgia},
  publisher = {Association for Computational Linguistics},
  url = {http://aclweb.org/anthology/W/W13/W13-1103.pdf}
}