###Instruction: Multi-class classification, answer with one of the labels:['no_consensus', 'delete', 'keep', 'comment', 'merge', 'redirect'] : ###Input:  Q4319444: immunogen (Q4319444) : in medicine, any substance that is capable of causing an immune reaction by acting as an antigen or aptene : ( delete | history | links | entity usage | logs ) Merged with Q1660181 , via The Game  -- JBGz1 ( talk ) 15:19, 5 July 2014 (UTC)