If a man is standing behind a big husky dog, who is standing with his face forward and his tongue hanging.
return man ;return husky dog ;return #2 that is big ;return #3 that is standing  ;return face of #4 ;return #4 where  #5 is forward ;return tongue of #6 ;return #6 where  #7 is hanging ;return if  #1 is standing  behind #8
['select', 'select', 'filter', 'filter', 'project', 'comparative', 'project', 'comparative', 'boolean']