###Instruction: Multi-class classification, answer with one of the labels:['no_consensus', 'delete', 'keep', 'comment', 'merge', 'redirect'] : ###Input:  Q2157674: Robert J. Lang (Q2157674) : American physicist, mathematician and origami expert : ( delete | history | links | entity usage | logs ) Merged with Q642995 . Mushroom ( talk ) 09:24, 14 July 2013 (UTC)