If there is a seal with a fish hanging from the left side of their mouth
return seals ;return fish ;return mouth of #1 ;return left side of #3 ;return #1 where  #2 is hanging from  #4 ;return number of  #5 ;return if  #6 is at least one
['select', 'select', 'project', 'project', 'comparative', 'aggregate', 'boolean']