( ( Battery ( Selection ( Lead ( acid batteries ) ) ) ) ( ( ( produce ( their ( electrical energy ) ) ) ( by ( ( changing ( sulfuric ( ( acid and ) lead ) ) ) ( into ( water ( and ( lead sulfate ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Battery) (NNP Selection) (JJ Lead) (NN acid) (NNS batteries)) (VP (VBP produce) (NP (PRP$ their) (JJ electrical) (NN energy)) (PP (IN by) (S (VP (VBG changing) (NP (JJ sulfuric) (NN acid) (CC and) (NN lead)) (PP (IN into) (NP (NN water) (CC and) (NN lead) (NN sulfate))))))) (. .)))
Battery Selection Lead acid batteries produce their electrical energy by changing sulfuric acid and lead into water and lead sulfate.
(ROOT (S (NP (JJ Lead) (NN sulfate)) (VP (VBZ is) (NP (NP (DT the) (JJ white) (JJ solid)) (SBAR (WHNP (WDT that)) (S (VP (VBZ forms) (PP (IN on) (NP (JJ corroded) (NN battery) (NNS terminals)))))))) (. .)))