@INPROCEEDINGS{Ludwig2011, author = {Nadine Ludwig and J\"org Waitelonis and Magnus Knuth and Harald Sack}, title = {{WhoKnows? - Evaluating Linked Data Heuristics with a Quiz that Cleans Up DBpedia}}, year = {2011}, booktitle = {Proc. of the 8th Extended Semantic Web Conference (ESWC), Poster-Session}, publisher = {Springer LNCS 6643} }