You can only know a tree has sweeter sap when you can compare it to other maple trees.
(you; can compare; it; to other maple trees) (You; can only know; a tree has sweeter sap when you can compare it to other maple trees) Context(You can only know,List([0, 17))):(a tree; has; sweeter sap)
You can only know,List([0, 17))
you You a tree
can compare can only know has
it to other maple trees
a tree has sweeter sap when you can compare it to other maple trees
sweeter sap