If exactly four dogs are shown in groups of two.
return dogs ;return groups of  #1 ;return number of #1 for each #2 ;return If #3 is  equal to two ;return number of #1 ;return If #5 is  equal to four ;return If both  #4 and #6 is  true
['select', 'project', 'group', 'boolean', 'aggregate', 'boolean', 'boolean']