If each image shows one cylindrical metal drum with a concave top, and the drums on the right and left have similar shaped stands.
return images ;return drums in  #1 ;return #2 that are cylindrical ;return #3 that are metal ;return top of #4 ;return #4 where  #5 is concave ;return number of  #6 for each  #1 ;return #1 where  #7 is equal to  one ;return number of  #8 ;return number of  #1 ;return if  #9 is equal to  #10 ;return the  right image ;return the  left image ;return drum in  #12 ;return drum in  #13 ;return stand of #14 ;return stand of #15 ;return if  #16 is shaped similar to  #17 ;return if  both  #11 and #18 are true
['select', 'project', 'filter', 'filter', 'project', 'comparative', 'group', 'comparative', 'aggregate', 'aggregate', 'boolean', 'select', 'select', 'project', 'project', 'project', 'project', 'boolean', 'boolean']