If a mother dog is laying on her side feeding at least 3 puppies.
return dog ;return #1 that is a  mother ;return side of #2 ;return #2 laying on #3 ;return puppies ;return #5 that #4 is feeding ;return number of  #6 ;return if  #7 is at least 3
['select', 'filter', 'project', 'filter', 'select', 'filter', 'aggregate', 'boolean']