( ( NUCLEAR ( ENERGY ( 8.1 ( ENERGY ( FROM NUCLEAR ) ) ) ) ) ( ( FUSION ( ( ( The nucleus ) ( of ( a ( hydrogen atom ) ) ) ) ( is ( a ( single proton ) ) ) ) ) . ) )
(ROOT (S (NP (CD NUCLEAR) (NNP ENERGY) (CD 8.1) (NNP ENERGY) (NNP FROM) (NN NUCLEAR)) (VP (VBD FUSION) (SBAR (S (NP (NP (DT The) (NN nucleus)) (PP (IN of) (NP (DT a) (NN hydrogen) (NN atom)))) (VP (VBZ is) (NP (DT a) (JJ single) (NN proton)))))) (. .)))
NUCLEAR ENERGY 8.1 ENERGY FROM NUCLEAR FUSION The nucleus of a hydrogen atom is a single proton.
(ROOT (S (PP (IN In) (NP (DT the) (JJ nuclear) (NN fusion) (NN process))) (, ,) (NP (CD two) (JJ light) (NNS nuclei)) (VP (VBP combine) (S (VP (TO to) (VP (VB produce) (NP (NP (DT a) (JJR heavier) (NN nucleus)) (CC and) (NP (JJ great) (NN energy))))))) (. .)))