( ( This compound ) ( ( contains ( ( ( ( ( ( the ( elements carbon ) ) , ) hydrogen ) , ) and ) oxygen ) ) . ) )
(ROOT (S (NP (DT This) (NN compound)) (VP (VBZ contains) (NP (NP (DT the) (NNS elements) (NN carbon)) (, ,) (NP (NN hydrogen)) (, ,) (CC and) (NP (NN oxygen)))) (. .)))
This compound contains the elements carbon, hydrogen, and oxygen.
(ROOT (S (NP (NP (NNS Compounds)) (VP (VBG containing) (NP (DT the) (NN element) (NN carbon)))) (VP (VBP are) (NP (NP (DT the) (NN basis)) (PP (IN of) (NP (DT all) (VBN known) (NN life))))) (. .)))
Compounds containing the element carbon are the basis of all known life.