( They ( ( are ( found ( in ( ( the nucleus ) ( of ( ( an atom ) ( along ( with neutrons ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP are) (VP (VBN found) (PP (IN in) (NP (NP (DT the) (NN nucleus)) (PP (IN of) (NP (NP (DT an) (NN atom)) (ADVP (IN along) (PP (IN with) (NP (NNS neutrons)))))))))) (. .)))
They are found in the nucleus of an atom along with 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))))) (. .)))