If an image shows just one hamster wearing something decorative on its head.
return hamster ;return something decorative ;return head of #1 ;return #1 that is wearing #2 on #3 ;return images ;return number of  #4 for each  #5 ;return #5 where  #6 is equal to  one ;return number of  #7 ;return if  #8 is at least one
['select', 'select', 'project', 'filter', 'select', 'group', 'comparative', 'aggregate', 'boolean']