If the pair of pictures shows exactly two dogs and no human.
return pictures ;return dogs in  #1 ;return humans in  #1 ;return number of #2 for each #1 ;return number of #3 for each #1 ;return sum of  #4 ;return sum of  #5 ;return if  #6 is  equal to two ;return if  #7 is  equal to zero ;return if  both  #8 and #9 are  true
['select', 'project', 'project', 'group', 'group', 'aggregate', 'aggregate', 'boolean', 'boolean', 'boolean']