( ( ( ( ( ( amino acid ) : ) ( ( organic compound ) ( of carbon ) ) ) , ) ( hydrogen ( , ( oxygen ( , ( and nitrogen ) ) ) ) ) ) ; )
(ROOT (NP (NP (JJ amino) (NN acid)) (: :) (NP (NP (JJ organic) (NN compound)) (PP (IN of) (NP (NN carbon)))) (, ,) (NP (NN hydrogen) (, ,) (NN oxygen) (, ,) (CC and) (NN nitrogen)) (: ;)))
amino acid: organic compound of 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)))))))) (. .)))