( ( These descriptions ) ( ( ( ( were qualitative ) , ) ( except ( for ( ( the ( quantitative composition ) ) ( of ( ( ( ( the compounds ) ( by mass ) ) and ) ( ( the measurements ) ( of ( ( the ( heat properties ) ) ( of ( ( ( the compounds ) and ) ( the elements ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT These) (NNS descriptions)) (VP (VBD were) (ADJP (JJ qualitative)) (, ,) (PP (IN except) (IN for) (NP (NP (DT the) (JJ quantitative) (NN composition)) (PP (IN of) (NP (NP (NP (DT the) (NNS compounds)) (PP (IN by) (NP (NN mass)))) (CC and) (NP (NP (DT the) (NNS measurements)) (PP (IN of) (NP (NP (DT the) (NN heat) (NNS properties)) (PP (IN of) (NP (NP (DT the) (NNS compounds)) (CC and) (NP (DT the) (NNS elements)))))))))))) (. .)))
These descriptions were qualitative, except for the quantitative composition of the compounds by mass and the measurements of the heat properties of the compounds and the elements.
(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)))))))) (. .)))