( ( When ( ( ( the nucleus ) ( of ( an atom ) ) ) splits ) ) ( , ( ( nuclear energy ) ( ( is ( produced ( in ( ( the form ) ( of ( ( ( heat energy ) and ) ( light energy ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NP (DT the) (NN nucleus)) (PP (IN of) (NP (DT an) (NN atom)))) (VP (VBZ splits)))) (, ,) (NP (JJ nuclear) (NN energy)) (VP (VBZ is) (VP (VBN produced) (PP (IN in) (NP (NP (DT the) (NN form)) (PP (IN of) (NP (NP (NN heat) (NN energy)) (CC and) (NP (JJ light) (NN energy)))))))) (. .)))
When the nucleus of an atom splits, nuclear energy is produced in the form of heat energy and light 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))))))) (. .)))