( ( ( nucleon ( ( ( ( Any particle ) , ) ( such ( as ( ( ( a proton ) or ) neutron ) ) ) ) , ) ) ( in ( ( the nucleus ) ( of ( an atom ) ) ) ) ) . )
(ROOT (S (VP (VB nucleon) (NP (NP (DT Any) (NN particle)) (, ,) (PP (JJ such) (IN as) (NP (NP (DT a) (NN proton)) (CC or) (NP (NN neutron)))) (, ,)) (PP (IN in) (NP (NP (DT the) (NN nucleus)) (PP (IN of) (NP (DT an) (NN atom)))))) (. .)))
nucleon Any particle, such as a proton or neutron, in the nucleus of an atom.
(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))))) (. .)))