If one mother and her cub are sitting in the grass together.
return mother ;return cub of #1 ;return grass ;return #1 that is sitting with #2 ;return #4 that are on #3 ;return number of  #5 ;return if  #6 is equal to  one
['select', 'project', 'select', 'filter', 'filter', 'aggregate', 'boolean']