If the left and right image contains the same number of head of broccoli.
return left image ;return right image ;return broccoli ;return head of #3 ;return #4 of #1 ;return #4 of #2 ;return the  number of  #5 ;return the  number of  #6 ;return if  #7 is the  same as #8
['select', 'select', 'select', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'boolean']