( ( ( ( ( ( The ( nucleus ( , ( or centre ) ) ) ) ( of ( ( ( ( an atom ) , ) ( is ( made ( of protons ) ) ) ) , ) ) ) ( -LRB- ( ( which ( have ( a ( positive ( electrical charge ) ) ) ) ) -RRB- ) ) ) and ) ( ( ( neutrons , ) ( which ( are neutral ) ) ) ( -LRB- ( ( ( in ( other words ) ) ( , ( they ( have ( no charge ) ) ) ) ) -RRB- ) ) ) ) . )
(ROOT (NP (NP (NP (NP (NP (DT The) (NN nucleus) (, ,) (CC or) (NN centre)) (PP (IN of) (NP (NP (DT an) (NN atom)) (, ,) (VP (VBZ is) (VP (VBN made) (PP (IN of) (NP (NNS protons))))) (, ,)))) (PRN (-LRB- -LRB-) (SBAR (WHNP (WDT which)) (S (VP (VBP have) (NP (DT a) (JJ positive) (JJ electrical) (NN charge))))) (-RRB- -RRB-))) (CC and) (NP (NP (NP (NNS neutrons)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (ADJP (JJ neutral)))))) (PRN (-LRB- -LRB-) (S (PP (IN in) (NP (JJ other) (NNS words))) (, ,) (NP (PRP they)) (VP (VBP have) (NP (DT no) (NN charge)))) (-RRB- -RRB-)))) (. .)))
The nucleus , or centre of an atom, is made of protons , (which have a positive electrical charge) and neutrons , which are neutral (in other words, they have no charge).
(ROOT (S (NP (DT A) (NN neutron)) (VP (VBZ has) (NP (ADJP (JJ neutral) (CC or) (DT no)) (NN charge))) (. .)))