If the left and right image contains the same number of standing elk.
return left image ;return right image ;return elks in  #1 ;return elks in  #2 ;return #3 that are standing ;return #4 that are standing ;return number of  #5 ;return number of  #6 ;return if  #7 is equal to  #8
['select', 'select', 'project', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'boolean']