question_text: How many tons of bombs and explosives were dropped on Cologne during the 261 air raids that did not happen during "Operation Millennium?"
decomposition: return air raids on Cologne ;return #1 during  Operation Millennium ;return #1 besides  #2 ;return tons of bombs dropped during  #3 ;return tons of explosives dropped during  #3 ;return #4 ,  #5 ;return the  sum of #6