( ( ( Mass ( Spectroscopy ( Mass Spectroscopy ) ) ) ( -LRB- ( MS -RRB- ) ) ) ( ( ( provides information ) ( about ( ( the ( elemental ( ( composition and ) structure ) ) ) ( of ( organic compounds ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Mass) (NNP Spectroscopy) (NNP Mass) (NNP Spectroscopy)) (PRN (-LRB- -LRB-) (NP (NNP MS)) (-RRB- -RRB-))) (VP (VBZ provides) (NP (NN information)) (PP (IN about) (NP (NP (DT the) (JJ elemental) (NN composition) (CC and) (NN structure)) (PP (IN of) (NP (JJ organic) (NNS compounds)))))) (. .)))
Mass Spectroscopy Mass Spectroscopy (MS) provides information about the elemental composition and structure of organic compounds.
(ROOT (S (NP (DT The) (NN term) (NN percent) (NN composition)) (VP (VBZ means) (NP (DT the) (NN percentage)) (PP (IN by) (NP (NP (NN mass)) (PP (IN of) (NP (NP (DT each) (NN element)) (PP (IN in) (NP (DT a) (NN compound)))))))) (. .)))