If in one of the pair of images, two dogs faces are visible.
return dogs ;return faces of #1 ;return #2 that are visible ;return images 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  one
['select', 'project', 'filter', 'project', 'group', 'comparative', 'aggregate', 'boolean']