( ( My substance ) ( ( is ( ( ( that ( of ( ( earth and ) air ) ) ) and ) ( ( water , ) ( ( ( all interchangeable ) forms ) ( of ( the ( same elements ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP$ My) (NN substance)) (VP (VBZ is) (NP (NP (NP (DT that)) (PP (IN of) (NP (NN earth) (CC and) (NN air)))) (CC and) (NP (NP (NN water)) (, ,) (NP (NP (ADJP (RB all) (JJ interchangeable)) (NNS forms)) (PP (IN of) (NP (DT the) (JJ same) (NNS elements))))))) (. .)))
My substance is that of earth and air and water, all interchangeable forms of the same elements.
(ROOT (S (NP (NNP Air)) (VP (MD can) (VP (VB be) (VP (VBN separated) (PP (IN into) (NP (JJ several) (NNS elements)))))) (. .)))