( ( ( ( nuclear fusion ) -- ) ( ( the binding ) ( of ( two ( light ( nuclei ( to ( ( form ( a ( heavier nucleus ) ) ) ( with ( ( some ( nuclear mass ) ) ( converted ( to energy ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (JJ nuclear) (NN fusion)) (: --) (NP (NP (DT the) (VBG binding)) (PP (IN of) (NP (CD two) (JJ light) (NN nuclei) (S (VP (TO to) (VP (VB form) (NP (DT a) (JJR heavier) (NN nucleus)) (PP (IN with) (NP (NP (DT some) (JJ nuclear) (NN mass)) (VP (VBN converted) (PP (TO to) (NP (NN energy)))))))))))) (. .)))
nuclear fusion -- the binding of two light nuclei to form a heavier nucleus with some nuclear mass converted to energy.
(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))))))) (. .)))