If each image features exactly one upright pottery vessel.
return pottery vessels ;return #1 that is upright ;return images ;return number of  #2 for each  #3 ;return #3 where  #4 is equal to  one ;return number of  #3 ;return number of  #5 ;return if  #6 is equal to  #7
['select', 'filter', 'select', 'group', 'comparative', 'aggregate', 'aggregate', 'boolean']