Iterative Refinement and Quality Checking of Annotation Guidelines - How to Deal Effectively with Semantically Sloppy Named Entity Types, such as Pathological Phenomena. - Udo Hahn; Elena Beisswanger; Ekaterina Buyko; Erik Faessler; Jenny Traumüller; Susann Schröder; Kerstin Hornbostel (LREC, 2012)