If each image contains exactly one purple item shaped like the number three.
return items ;return #1 that are  purple ;return #2 that are  shaped like the  number three ;return images of  #3 ;return number of #3 for each #4 ;return #4 where #5 is  equal to one ;return number of  #6 ;return number of  #4 ;return if  #7 is  equal to #8
['select', 'filter', 'filter', 'project', 'group', 'comparative', 'aggregate', 'aggregate', 'boolean']