( energy ( ( is ( ( produced ( through ( ( the fusion ) ( of ( a ( fourth ( hydrogen nucleus ) ) ) ) ) ) ) ( to ( release ( ( ( ( a ( helium nucleus ) ) ( -LRB- ( ( alpha particle ) -RRB- ) ) ) and ) ( the ( original ( carbon isotope ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN energy)) (VP (VBZ is) (VP (VBN produced) (PP (IN through) (NP (NP (DT the) (NN fusion)) (PP (IN of) (NP (DT a) (JJ fourth) (NN hydrogen) (NN nucleus))))) (S (VP (TO to) (VP (VB release) (NP (NP (DT a) (JJ helium) (NN nucleus)) (PRN (-LRB- -LRB-) (NP (JJ alpha) (NN particle)) (-RRB- -RRB-)) (CC and) (NP (DT the) (JJ original) (NN carbon) (NN isotope)))))))) (. .)))
energy is produced through the fusion of a fourth hydrogen nucleus to release a helium nucleus (alpha particle) and the original carbon isotope.
(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))))))) (. .)))