( ( ( ( An atom ) ( with ( one proton ) ) ) ( -LRB- ( and ( ( one electron ) -RRB- ) ) ) ) ( ( is hydrogen ) ; ) )
(ROOT (S (NP (NP (NP (DT An) (NN atom)) (PP (IN with) (NP (CD one) (NN proton)))) (PRN (-LRB- -LRB-) (CC and) (ADJP (NP (CD one)) (JJ electron)) (-RRB- -RRB-))) (VP (VBZ is) (NP (NN hydrogen))) (: ;)))
An atom with one proton (and one electron) is hydrogen;
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD one) (NNS electrons)) (PP (IN in) (NP (DT the) (NN hydrogen) (NN atom))))) (. .)))