( Weight ( ( ( pulls ( the object ) ) ( downward ( because ( of ( the gravity ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Weight)) (VP (VBZ pulls) (NP (DT the) (NN object)) (PP (ADVP (RB downward)) (IN because) (IN of) (NP (DT the) (NN gravity)))) (. .)))
Weight pulls the object downward because of the gravity.
(ROOT (S (NP (NNP Weight)) (VP (VBZ is) (NP (NP (DT the) (NN measure)) (PP (IN of) (NP (NP (DT the) (NN force)) (PP (IN of) (NP (NP (NN gravity)) (VP (VBG pulling) (PRT (RP down)) (PP (IN on) (NP (DT an) (NN object)))))))))) (. .)))