Air forced by the pump pushes the ball up the plastic tube, and gravity makes it come down.
(Air; forced; by the pump) (Air forced by the pump; pushes; the ball; up) (gravity; makes; it come down) Context(gravity makes,List([64, 77))):(it; come; down)
gravity makes,List([64, 77))
Air Air forced by the pump gravity it
forced pushes makes come
by the pump
the ball up
it come down
down