###Instruction: Multi-class classification, answer with one of the labels:['no_consensus', 'delete', 'keep', 'comment', 'merge', 'redirect'] : ###Input:  Q13156375: Leonhard Euler (Q13156375) : Swiss mathematician, physicist, and engineer (1707–1783) : ( delete | history | links | entity usage | logs ) Empty. Vargenau ( talk ) 07:56, 13 September 2013 (UTC)