( ( ( A neutron ) ( fired ( into ( a nucleus ) ) ) ) ( ( can ( cause ( ( nuclear fission ) ( -LRB- ( ( ( the splitting ) ( of atoms ) ) -RRB- ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (NN neutron)) (VP (VBN fired) (PP (IN into) (NP (DT a) (NN nucleus))))) (VP (MD can) (VP (VB cause) (NP (NP (JJ nuclear) (NN fission)) (PRN (-LRB- -LRB-) (NP (NP (DT the) (NN splitting)) (PP (IN of) (NP (NNS atoms)))) (-RRB- -RRB-))))) (. .)))
A neutron fired into a nucleus can cause nuclear fission (the splitting of atoms).
(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))))))) (. .)))