If left and right images contain the same number of warthogs, and the combined images contain at least four warthogs.
return the  left image ;return the  right image ;return warthogs in  #1 ;return warthogs in  #2 ;return number of #3 ;return number of #4 ;return if  #5 is  equal to #6 ;return sum of  #5 and #6 ;return if  #8 is  at least four ;return if  both  #7 and #9 are  true
['select', 'select', 'project', 'project', 'aggregate', 'aggregate', 'boolean', 'arithmetic', 'boolean', 'boolean']