( ( 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 (NNP Heat)) (VP (VBZ is) (VP (VBN produced) (SBAR (WHADVP (WRB when)) (S (NP (NN paper)) (VP (VBZ is) (VP (VBN burned))))))) (. .)))
Heat is produced when paper is burned.