If there is a sticker on the spine of one of the binders.
return sticker ;return binders ;return spine of #2 ;return #1 that is on #3 ;return #2 that has #4 ;return number of  #5 ;return if  #6 is equal to  one
['select', 'select', 'project', 'filter', 'filter', 'aggregate', 'boolean']