@inproceedings{beyondplainspatialknowledgedetermining,
  title = {Beyond Plain Spatial Knowledge: Determining Where Entities Are and Are Not Located, and For How Long},
  author = {Alakan Vempala and a and Eduardo Blanco},
  year = {2016},
  booktitle = {ACL 2016 8},
  url = {https://aclanthology.org/P16-1142},
}