@InProceedings{dsouza-ng:2015:EMNLP,
  author    = {D'Souza, Jennifer  and  Ng, Vincent},
  title     = {Sieve-Based Spatial Relation Extraction with Expanding Parse Trees},
  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     = {758--768},
  url       = {https://aclweb.org/anthology/D/D15/D15-1087}
}