In the mountainous regions you find that all the valleys are broad, U-shaped valleys .
(you; find; that all the valleys are broad, U-shaped valleys; L:In the mountainous regions) Context(you find,List([27, 35))):(all the valleys; are; broad, U-shaped valleys)
you find,List([27, 35))
you all the valleys
find are
that all the valleys are broad, U-shaped valleys L:In the mountainous regions
broad, U-shaped valleys