Polar bears can walk on ice. Polar bears live in North America.
(Polar bears can walk on ice; bears live; Polar) Context(Polar bears can walk on ice bears live,List([0, 45))):(Polar bears; can walk; L:on ice)
Polar bears can walk on ice bears live,List([0, 45))
Polar bears can walk on ice Polar bears
bears live can walk
Polar
L:on ice