( Neutrons ( ( ( ( ( are electrically ) neutral ) and ) ( of ( ( approximately ( the ( same mass ) ) ) ( as protons ) ) ) ) . ) )
(ROOT (S (NP (NNS Neutrons)) (VP (VP (VBP are) (ADVP (RB electrically)) (ADJP (JJ neutral))) (CC and) (VP (PP (IN of) (NP (NP (RB approximately) (DT the) (JJ same) (NN mass)) (PP (IN as) (NP (NNS protons))))))) (. .)))
Neutrons are electrically neutral and of approximately the same mass as protons.
(ROOT (S (NP (NNS Neutrons)) (VP (VBP are) (ADVP (RB electrically)) (ADJP (JJ neutral))) (. .)))