( ( In ( a ( neutral atom ) ) ) ( ( ( the number ) ( of protons ) ) ( ( is ( equal ( to ( ( the number ) ( of electrons ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN In) (NP (DT a) (JJ neutral) (NN atom))) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NNS protons)))) (VP (VBZ is) (ADJP (JJ equal) (PP (TO to) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NNS electrons))))))) (. .)))
In a neutral atom the number of protons is equal to the number of electrons.
(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))) (. .)))