( ( In ( physics jargon ) ) ( , ( weight ( ( is ( ( the force ) ( of ( gravity ( acting ( on mass ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NN physics) (NN jargon))) (, ,) (NP (NN weight)) (VP (VBZ is) (NP (NP (DT the) (NN force)) (PP (IN of) (NP (NP (NN gravity)) (VP (VBG acting) (PP (IN on) (NP (NN mass)))))))) (. .)))
In physics jargon, weight is the force of gravity acting on mass.
(ROOT (S (NP (NNP Weight)) (VP (VBZ is) (NP (NP (DT the) (NN force)) (PP (IN of) (NP (NN gravity))))) (. .)))