( ( Weight The ) ( ( ( pull ( of gravity ) ) ( on ( an object ) ) ) . ) )
(ROOT (S (NP (NNP Weight) (NNP The)) (VP (VBP pull) (PP (IN of) (NP (NN gravity))) (PP (IN on) (NP (DT an) (NN object)))) (. .)))
Weight The pull of gravity on an object.
(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)))))))))) (. .)))