If one image has three wolves without any snow.
return wolves ;return snow ;return images ;return #3 that are  with  #2 ;return #3 besides  #4 ;return number of #1 for each #5 ;return #5 where #6 is  equal to three ;return number of #7 ;return If #8 is  equal to one
['select', 'select', 'select', 'filter', 'discard', 'group', 'comparative', 'aggregate', 'boolean']