( Weight ( ( is ( measured ( in ( ( newtons , ) ( ( the ( standard unit ) ) ( for force ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Weight)) (VP (VBZ is) (VP (VBN measured) (PP (IN in) (NP (NP (NNS newtons)) (, ,) (NP (NP (DT the) (JJ standard) (NN unit)) (PP (IN for) (NP (NN force)))))))) (. .)))
Weight is measured in newtons, the standard unit for force.
(ROOT (S (NP (NP (NNP Newton)) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-))) (VP (VBZ is) (NP (NP (DT the) (NN si) (NN unit)) (PP (IN for) (NP (NN weight))))) (. .)))
Newton (n) is the si unit for weight.