( ( ( ( Electrons ( contain ( ( a ( negative charge ) ) ( , ( ( protons ( ( a ( positive charge ) ) . ) ) ( Neutrons ( are neutral ) ) ) ) ) ) ) -- ) ( they ( have ( neither ( ( ( a positive ) nor ) ( a ( negative charge ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Electrons)) (VP (VBP contain) (SBAR (S (NP (DT a) (JJ negative) (NN charge)) (, ,) (X (ADVP (RB protons)) (NP (DT a) (JJ positive) (NN charge)) (. .)) (NP (NNP Neutrons)) (VP (VBP are) (ADJP (JJ neutral))))))) (: --) (S (NP (PRP they)) (VP (VBP have) (S (NP (CC neither) (NP (DT a) (NN positive)) (CC nor) (NP (DT a) (JJ negative) (NN charge)))))) (. .)))
Electrons contain a negative charge, protons a positive charge. Neutrons are neutral – they have neither a positive nor a negative charge.
(ROOT (S (NP (DT A) (NN neutron)) (VP (VBZ has) (NP (ADJP (JJ neutral) (CC or) (DT no)) (NN charge))) (. .)))