YAGO2: A Spatially and Temporally Enhanced Knowledge Base from Wikipedia: Extended Abstract. Hoffart, J., Suchanek, F. M, Berberich, K., & Weikum, G. In 23rd International Joint Conference on Artificial Intelligence, IJCAI 2013, Beijing, China, pages 3161–3165, 2013.
bibtex   
@inproceedings{Hoffart:2013ww,
	author = {Hoffart, Johannes and Suchanek, Fabian M and Berberich, Klaus and Weikum, Gerhard},
	booktitle = {23rd International Joint Conference on Artificial Intelligence, IJCAI 2013, Beijing, China},
	pages = {3161--3165},
	title = {{YAGO2: A Spatially and Temporally Enhanced Knowledge Base from Wikipedia: Extended Abstract}},
	year = {2013}}

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