If one dog has its mouth open and tongue hanging out.
return dogs ;return mouth of #1 ;return #1 where  #2 is open ;return tongue of #3 ;return #3 where  #4 is hanging out ;return number of  #5 ;return if  #6 is equal to  one
['select', 'project', 'comparative', 'project', 'comparative', 'aggregate', 'boolean']