International Workshop on Concept Discovery in Unstructured Data 2011, Cdud 2011 - In Conjunction with the 13Th International Conference on Rough Sets, Fuzzy Sets, Data Mining and Granular Computing, Rsfdgrc 2011, Date: 25 June 2011 through 25 June 2011, Location: Moscow, Sponsors: ABBYY;Russian Foundation for Basic Research;Poncelet Laboratory (UMI 2615 du CNRS);State University Higher School of Economics;Yandex