@inproceedings{han-etal-2013-stacking,
    title = "A Stacking-based Approach to {T}witter User Geolocation Prediction",
    author = "Han, Bo  and
      Cook, Paul  and
      Baldwin, Timothy",
    editor = "Butt, Miriam  and
      Hussain, Sarmad",
    booktitle = "Proceedings of the 51st Annual Meeting of the Association for Computational Linguistics: System Demonstrations",
    month = aug,
    year = "2013",
    address = "Sofia, Bulgaria",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/P13-4002",
    pages = "7--12",
}