( It ( ( ( ( has ( ( ( ( a weight ) , ) ( a mass ) ) , ) ) and ) ( is ( opposing ( ( the force ) ( of ( gravity ( for ( many years ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VP (VBZ has) (NP (NP (DT a) (NN weight)) (, ,) (NP (DT a) (NN mass)) (, ,))) (CC and) (VP (VBZ is) (VP (VBG opposing) (NP (NP (DT the) (NN force)) (PP (IN of) (NP (NP (NN gravity)) (PP (IN for) (NP (JJ many) (NNS years))))))))) (. .)))
It has a weight, a mass, and is opposing the force of gravity for many years.
(ROOT (S (NP (NNP Weight)) (VP (VBZ is) (NP (NP (DT the) (NN result)) (PP (IN of) (NP (NP (DT the) (NN force)) (PP (IN of) (NP (NP (NN gravity)) (VP (VBG being) (VP (VBN opposed) (PP (IN by) (NP (DT the) (JJ normal) (NN force))))))))))) (. .)))