( Weight ( ( is ( ( the measure ) ( of ( ( force , ) ( ( which gravity ) ( exerts ( on ( an object ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Weight)) (VP (VBZ is) (NP (NP (DT the) (NN measure)) (PP (IN of) (NP (NP (NN force)) (, ,) (SBAR (WHNP (WDT which) (NN gravity)) (S (VP (VBZ exerts) (PP (IN on) (NP (DT an) (NN object)))))))))) (. .)))
Weight is the measure of force, which gravity exerts on an object.
(ROOT (S (NP (NNP Weight)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (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)))))))))))) (. .)))