###Instruction: Multi-class classification, answer with one of the labels:['no_consensus', 'delete', 'keep', 'comment', 'merge', 'redirect'] : ###Input:  Q15921136: R-540 Whirlwind (Q15921136) : R-5 piston aircraft engine, five-cylinder version of the Whirlwind : ( delete | history | links | entity usage | logs ) Merged with Q8038249 duplicate. Joshbaumgartner ( talk ) 16:40, 10 March 2014 (UTC)