( ( ( Earth 's ) gravity ) ( ( attracts ( the ( asteroids 5 ) ) ) . ) )
(ROOT (S (NP (NP (NNP Earth) (POS 's)) (NN gravity)) (VP (VBZ attracts) (NP (DT the) (JJ asteroids) (CD 5))) (. .)))
Earth's gravity attracts the asteroids 5.
(ROOT (S (NP (NNP Gravity)) (VP (VBZ attracts) (NP (DT the) (NN earth)) (PP (TO to) (NP (DT the) (NN sun)))) (. .)))