( ( Compound ( containing ( only ( ( ( ( ( the ( two elements ) ) , ) carbon ) and ) hydrogen ) ) ) ) . )
(ROOT (NP (NP (NN Compound)) (VP (VBG containing) (NP (RB only) (NP (DT the) (CD two) (NNS elements)) (, ,) (NP (NN carbon)) (CC and) (NP (NN hydrogen)))) (. .)))
Compound containing only the two elements, carbon and hydrogen.
(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.