###Instruction: Multi-class classification, answer with one of the labels:['no_consensus', 'delete', 'keep', 'comment', 'merge', 'redirect'] : ###Input:  Q3306646: certificate (Q3306646) : document that formally acknowledges something : ( delete | history | links | entity usage | logs ) Merged with Q3306646 . Moscowconnection ( talk ) 13:34, 5 November 2013 (UTC)