@inproceedings{lee-2013-multi,
    title = "Multi-layered Annotation of Non-textual Data for Spatial Information",
    author = "Lee, Kiyong",
    editor = "Bunt, Harry",
    booktitle = "Proceedings of the 9th Joint {ISO} - {ACL} {SIGSEM} Workshop on Interoperable Semantic Annotation",
    month = mar,
    year = "2013",
    address = "Potsdam, Germany",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/W13-0502",
    pages = "15--24",
}