( ( In ( this process ) ) ( , ( ( explosive ( nuclear fusion ) ) ( ( ( ( ( burns matter ) ( into ( ( ( ( the ( ( most stable ) ( atomic nucleus ) ) ) , ) iron ) , ) ) ) and ) ( releases ( ( a ( gigantic amount ) ) ( of energy ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT this) (NN process))) (, ,) (NP (JJ explosive) (JJ nuclear) (NN fusion)) (VP (VP (VBZ burns) (NP (NN matter)) (PP (IN into) (NP (NP (DT the) (ADJP (RBS most) (JJ stable)) (JJ atomic) (NN nucleus)) (, ,) (NP (NN iron)) (, ,)))) (CC and) (VP (VBZ releases) (NP (NP (DT a) (JJ gigantic) (NN amount)) (PP (IN of) (NP (NN energy)))))) (. .)))
In this process, explosive nuclear fusion burns matter into the most stable atomic nucleus, iron, and releases a gigantic amount of energy.
(ROOT (S (NP (JJ Nuclear) (NN energy)) (VP (VBZ is) (VP (VBN released) (SBAR (WHADVP (WRB when)) (S (NP (NP (DT the) (NN nucleus)) (PP (IN of) (NP (DT an) (NN atom)))) (VP (VBZ is) (VP (VBN split))))))) (. .)))