If there is a pencil pouch with the zipper open on top
return pencil pouch ;return zipper of #1 ;return top of #1 ;return #2 that is open ;return #4 that is on #3 ;return #1 that has #5 ;return number of  #6 ;return if  #7 is at least one
['select', 'project', 'project', 'filter', 'filter', 'filter', 'aggregate', 'boolean']