@InProceedings{louis-cohen:2015:EMNLP,
  author    = {Louis, Annie  and  Cohen, Shay B.},
  title     = {Conversation Trees: A Grammar Model for Topic Structure in Forums},
  booktitle = {Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing},
  month     = {September},
  year      = {2015},
  address   = {Lisbon, Portugal},
  publisher = {Association for Computational Linguistics},
  pages     = {1543--1553},
  url       = {http://aclweb.org/anthology/D15-1178}
}