( ( The nucleus ) ( ( is ( made ( of ( ( neutrons and ) protons ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN nucleus)) (VP (VBZ is) (VP (VBN made) (PP (IN of) (NP (NNS neutrons) (CC and) (NNS protons))))) (. .)))
The nucleus is made of neutrons and protons.
(ROOT (S (NP (NNS Protons) (CC and) (NNS neutrons)) (VP (VBP are) (VP (VBN located) (PP (IN in) (NP (DT the) (JJ central) (NN nucleus))))) (. .)))