For example, the Grand Canyon's sides are composed of many layers of deposited layers, and the river cut through them to form the canyon.
(the Grand Canyon's sides; are composed; of many layers of deposited layers) (the river; cut; through them; to form the canyon) Context(the river cut,List([91, 104))):(the river; cut through them to form; the canyon)
the river cut,List([91, 104))
the Grand Canyon's sides the river the river
are composed cut cut through them to form
of many layers of deposited layers
through them to form the canyon
the canyon