Rattenbury, Tye ; Good, Nathaniel ; Naaman, Mor: Towards automatic extraction of event and place semantics from flickr tags. In: SIGIR '07: Proceedings of the 30th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval. New York, NY, USA : ACM Press, 2007. - ISBN 978-1-59593-597-7, S. 103--110