( ( In ( a ( neutral atom ) ) ) ( ( ( the number ) ( of electrons ) ) ( ( is ( equal ( to ( ( the number ) ( of protons ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN In) (NP (DT a) (JJ neutral) (NN atom))) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NNS electrons)))) (VP (VBZ is) (ADJP (JJ equal) (PP (TO to) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NNS protons))))))) (. .)))
In a neutral atom the number of electrons is equal to the number of protons.
(ROOT (S (SBAR (IN Because) (S (NP (NNS atoms)) (VP (VBP have) (NP (NP (JJ equal) (NNS numbers)) (PP (IN of) (NP (NP (JJ positive) (NNS protons)) (CC and) (NP (JJ negative) (NNS electrons)))))))) (, ,) (NP (PRP they)) (VP (VBP possess) (NP (DT a) (JJ neutral) (NN charge))) (. .)))