( ( ( The ( Nucleus ( The nucleus ) ) ) ( of ( an atom ) ) ) ( ( is ( made ( of ( ( protons and ) neutrons ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNP Nucleus) (NNP The) (NN nucleus)) (PP (IN of) (NP (DT an) (NN atom)))) (VP (VBZ is) (VP (VBN made) (PP (IN of) (NP (NNS protons) (CC and) (NNS neutrons))))) (. .)))
The Nucleus The nucleus of an atom is made of protons and neutrons.
(ROOT (S (NP (NP (DT The) (NN atom)) (PP (IN in) (NP (DT a) (NN neutron)))) (VP (VBZ is) (VP (VBN found) (PP (IN in) (NP (DT the) (DT the) (NN nucleus))))) (. .)))