###Instruction: Multi-class classification, answer with one of the labels:['no_consensus', 'delete', 'keep', 'comment', 'merge', 'redirect'] : ###Input:  Q12594240: rook polynomial (Q12594240) : generating polynomial of the number of ways to place k non-attacking rooks on a m×n chessboard : ( delete | history | links | entity usage | logs ) Blank entry(merged into Q17087181)
-- 송현진 ( talk ) 08:05, 14 September 2018 (UTC) Not deleted due to merger — MisterSynergy ( talk ) 09:02, 18 September 2018 (UTC)