( ( A neutron ) ( ( is ( ( an ( uncharged particle ) ) ( found ( in ( ( the nucleus ) ( of ( an atom ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN neutron)) (VP (VBZ is) (NP (NP (DT an) (JJ uncharged) (NN particle)) (VP (VBN found) (PP (IN in) (NP (NP (DT the) (NN nucleus)) (PP (IN of) (NP (DT an) (NN atom)))))))) (. .)))
A neutron is an uncharged particle found 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))))) (. .)))