When glaciers move, they eat into the land and rock over which they pass, changing the shape of the landscape.
(glaciers; move; ) (the land and rock; pass; they) (they; eat; L:into the land and rock; T:When glaciers move) Context(they eat,List([20, 28))):(they; eat changing; the shape of the landscape)
they eat,List([20, 28))
glaciers the land and rock they they
move pass eat eat changing
they
L:into the land and rock T:When glaciers move
the shape of the landscape