Attribute Exploration on the Web. In Peggy Cellier, Felix Distel, und Bernhard Ganter (Hrsg.), Contributions to the 11th International Conference on Formal Concept Analysis, 19--34, Mai 2013. [PUMA: information concept ir crowdsourcing human exploration analysis l3s computing lod iteg retrieval attribute data knowledge web open formal acquisition sparql fca 2013 search linked] URL