( ( At ( ( the centre ) ( of ( every atom ) ) ) ) ( ( is ( ( a nucleus ) ( containing ( ( protons and ) neutrons ) ) ) ) . ) )
(ROOT (SINV (PP (IN At) (NP (NP (DT the) (NN centre)) (PP (IN of) (NP (DT every) (NN atom))))) (VP (VBZ is)) (NP (NP (DT a) (NN nucleus)) (VP (VBG containing) (NP (NNS protons) (CC and) (NNS neutrons)))) (. .)))
At the centre of every atom is a nucleus containing 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))))) (. .)))