( ( Amino acids ) ( ( contain ( ( ( ( ( ( ( carbon , ) hydrogen ) , ) oxygen ) , ) and ) nitrogen ) ) . ) )
(ROOT (S (NP (NNP Amino) (NNS acids)) (VP (VBP contain) (NP (NP (NN carbon)) (, ,) (NP (NN hydrogen)) (, ,) (NP (NN oxygen)) (, ,) (CC and) (NP (NN nitrogen)))) (. .)))
Amino acids contain carbon, hydrogen, oxygen, and nitrogen.
(ROOT (S (NP (NNP Rna) (CC and) (NNP dna)) (VP (VBP are) (NP (NP (NNS types)) (PP (IN of) (NP (NP (JJ nucleic) (NNS acids)) (VP (VBG containing) (NP (NP (DT the) (NNS elements)) (NP (NN carbon) (, ,) (NN hydrogen) (, ,) (NN oxygen) (, ,) (NN nitrogen) (, ,) (CC and) (NN phosphorus)))))))) (. .)))