( ( Neutrons ( are ( located ( in ( the ( atom nucleus ) ) ) ) ) ) ( , ( ( ( ( ( ( are electrically ) neutral ) , ) and ) ( each ( has ( ( mass ( about equal ) ) ( to ( a proton ) ) ) ) ) ) . ) ) )
(ROOT (S (S (NP (NNS Neutrons)) (VP (VBP are) (VP (VBN located) (PP (IN in) (NP (DT the) (NN atom) (NN nucleus)))))) (, ,) (VP (VBP are) (ADVP (RB electrically)) (ADJP (JJ neutral))) (, ,) (CC and) (S (NP (DT each)) (VP (VBZ has) (ADJP (ADJP (RB mass) (RB about) (JJ equal)) (PP (TO to) (NP (DT a) (NN proton)))))) (. .)))
Neutrons are located in the atom nucleus, are electrically neutral, and each has mass about equal to a proton.
(ROOT (S (NP (NNS Neutrons)) (VP (VBP are) (ADVP (RB electrically)) (ADJP (JJ neutral))) (. .)))