If a group of people are in canoes with their hands in the air.
return group of people ;return canoes ;return hands of #1 ;return #1 that are in  #2 ;return #4 where  #3 are in  the  air ;return number of  #5 ;return if  #6 is at least one
['select', 'select', 'project', 'filter', 'comparative', 'aggregate', 'boolean']