###Instruction: Multi-class classification, answer with one of the labels:['no_consensus', 'delete', 'keep', 'comment', 'merge', 'redirect'] : ###Input:  Q12960077: substitution reaction (Q12960077) : chemical reaction during which one functional group in a chemical compound is replaced by another functional group : ( delete | history | links | entity usage | logs ) Merged with Q503396 . Dcirovic ( talk ) 02:17, 25 March 2014 (UTC)