If in the left image there is a skunk and one other animal.
return left image ;return skunk in  #1 ;return animals in  #1 ;return #3 besides  #2 ;return number of  #2 ;return number of  #4 ;return if  #5 is at least one ;return if  #6 is equal to  one ;return if  both  #7 and #8 are true
['select', 'project', 'project', 'discard', 'aggregate', 'aggregate', 'boolean', 'boolean', 'boolean']