If there are four white vases standing in groups of two.
return vases ;return #1 that are white ;return #2 that are standing ;return groups of #3 ;return number of  #3 for each  #4 ;return #4 where  #5 is equal to  two ;return number of  #6 ;return if  #7 is equal to  two
['select', 'filter', 'filter', 'project', 'group', 'comparative', 'aggregate', 'boolean']