If at least one of the images in the set does not feature four knee pads.
return knee pads ;return images ;return number of  #1 for each  #2 ;return #2 where  #3 is equal to  four ;return #2 besides  #4 ;return number of  #5 ;return if  #6 is at least one
['select', 'select', 'group', 'comparative', 'discard', 'aggregate', 'boolean']