If at least one dog has a leash attached, and at least one dog has an open, non-snarling mouth.
return dogs ;return leash ;return #1 that has #2 attached ;return mouth of #1 ;return #1 where  #4 is open ;return #5 where  #4 is non-snarling ;return number of  #3 ;return number of  #6 ;return if  #7 is at least one ;return if  #8 is at least one ;return if  both  #9 and #10 are true
['select', 'select', 'filter', 'project', 'comparative', 'comparative', 'aggregate', 'aggregate', 'boolean', 'boolean', 'boolean']