( ( ( Point out ) ( that ( ( the ( hydrogen atom ) ) ( has ( only ( one electron ) ) ) ) ) ) . )
(ROOT (S (VP (VB Point) (PRT (RP out)) (SBAR (IN that) (S (NP (DT the) (NN hydrogen) (NN atom)) (VP (VBZ has) (NP (RB only) (CD one) (NN electron)))))) (. .)))
Point out that the hydrogen atom has only one electron.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD one) (NNS electrons)) (PP (IN in) (NP (DT the) (NN hydrogen) (NN atom))))) (. .)))