If the combined images include two standing dogs, with at least one of them wearing a collar but no pack.
return dogs ;return #1 that are standing ;return number of  #2 ;return if  #3 is equal to  two ;return collar ;return #2 that is wearing #5 ;return pack ;return #6 that has #7 ;return #6 besides  #8 ;return number of  #9 ;return if  #10 is at least one ;return if  both  #4 and #11 are true
['select', 'filter', 'aggregate', 'boolean', 'select', 'filter', 'select', 'filter', 'discard', 'aggregate', 'boolean', 'boolean']