America's tallest waterfall was created when glaciers turned V-shaped Yosemite Valley into a U-shaped valley, scraping away the gentler slope that Yosemite Creek traversed several million years ago.
(America's tallest waterfall; was created; T:when glaciers turned V-shaped Yosemite Valley into a U-shaped valley) (the gentler slope; traversed; T:several million years ago) (glaciers; turned; V-shaped Yosemite Valley; into a U-shaped valley) Context(glaciers turned,List([45, 60))):(glaciers; turned V-shaped Yosemite Valley scraping away; the gentler slope that Yosemite Creek traversed several million years ago)
glaciers turned,List([45, 60))
America's tallest waterfall the gentler slope glaciers glaciers
was created traversed turned turned V-shaped Yosemite Valley scraping away
T:when glaciers turned V-shaped Yosemite Valley into a U-shaped valley
T:several million years ago
V-shaped Yosemite Valley into a U-shaped valley
the gentler slope that Yosemite Creek traversed several million years ago