###Instruction: Multi-class classification, answer with one of the labels:['no_consensus', 'delete', 'keep', 'comment', 'merge', 'redirect'] : ###Input:  Q12049211: X-ray fluorescence (Q12049211) : emission of characteristic "secondary" X-rays from a material that has been excited by high-energy X-rays or gamma rays : ( delete | history | links | entity usage | logs ) Merged with Q898974 . Holger1959 ( talk ) 04:53, 12 July 2013 (UTC)