As these glaciers moved downhill, they gouged the earth and rock, creating U-shaped valleys.
(these glaciers; moved; downhill) (they; gouged; the earth and rock; T:As these glaciers moved downhill) Context(they gouged,List([34, 45))):(they; gouged the earth and rock creating; U-shaped valleys)
they gouged,List([34, 45))
these glaciers they they
moved gouged gouged the earth and rock creating
downhill
the earth and rock T:As these glaciers moved downhill
U-shaped valleys