If there are six mammals huddled in groups of three.
return mammals ;return #1 that are huddled ;return groups of #2 ;return number of  #2 for each  #3 ;return #3 where  #4 is equal to  three ;return number of  #5 ;return if  #6 is equal to  two
['select', 'filter', 'project', 'group', 'comparative', 'aggregate', 'boolean']