However, in places the river narrows into steep granite lined canyons, the water cascades over ledges and this energy keeps the water from freezing, leaving dangerous and beautiful stretches of open water.
(the water; cascades; ) Context(the water cascades,List([71, 89))):(the river; narrows; into steep granite lined canyons; L:in places) (this energy; keeps; the water; from freezing) Context(this energy keeps,List([106, 123))):(this energy; keeps the water leaving; dangerous and beautiful stretches of open water)
the water cascades,List([71, 89)) this energy keeps,List([106, 123))
the water the river this energy this energy
cascades narrows keeps keeps the water leaving
into steep granite lined canyons L:in places
the water from freezing
dangerous and beautiful stretches of open water