( it ( ( contains ( ( ( the ( chemical ( elements carbon ) ) ) and ) hydrogen ) ) . ) )
(ROOT (S (NP (PRP it)) (VP (VBZ contains) (NP (NP (DT the) (JJ chemical) (NNS elements) (NN carbon)) (CC and) (NP (NN hydrogen)))) (. .)))
it contains the chemical elements carbon and hydrogen.
(ROOT (S (NP (NNP Carbon)) (VP (VBZ is) (NP (NP (DT the) (NN basis)) (PP (IN of) (NP (NP (DT all) (NN life)) (PP (IN on) (NP (NN earth))))))) (. .)))