( ( The electrons ) ( ( orbit ( ( the nucleus ) ( of ( the atom ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS electrons)) (VP (VBZ orbit) (NP (NP (DT the) (NN nucleus)) (PP (IN of) (NP (DT the) (NN atom))))) (. .)))
The electrons orbit the nucleus of the atom.
(ROOT (S (NP (NP (DT The) (NN electron)) (VP (VBN released) (PP (IN during) (NP (JJ beta) (NN decay))))) (VP (VBZ is) (RB not) (NP (NP (DT an) (JJ orbital) (NN electron)) (PP (CC but) (NP (NP (DT an) (NN electron)) (SBAR (WHNP (WP$ whose) (NNS origin)) (S (VP (VBD was) (PP (IN in) (NP (DT the) (NN nucleus)))))))))) (. .)))