Machine learning challenges : evaluating predictive uncertainty visual object classification and recognising textual entailment : first pascal machine learning challenges workshop, mlcw 2005, southampton, uk, april 11-13, 2005 : revised selected papers - Quiñonero-Candela, Joaquin, 1977-; Dagan, Ido; Magnini, Bernardo (Lecture notes in artificial intelligence, 2006)