@inproceedings{nepom2014whatwherewhen,
  title={What, Where, and When: Keyword Search with Spatio-Temporal Ranges,
  author={Sergey Nepomnyachiy and Bluma Gelley and Wei Jiang and Tehila Minkus},
  booktitle={Geographic Information Retrieval (GIR) at SIGSPATIAL'14},
  year={2014}
}