( ( Zinc sulfate ) ( ( is ( ( a ( grayish-white substance ) ) ( that ( ( is sometimes ) ( seen ( on ( ( the ( battery post ) ) ( of ( an ( automobile battery ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Zinc) (NN sulfate)) (VP (VBZ is) (NP (NP (DT a) (JJ grayish-white) (NN substance)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADVP (RB sometimes)) (VP (VBN seen) (PP (IN on) (NP (NP (DT the) (NN battery) (NN post)) (PP (IN of) (NP (DT an) (NN automobile) (NN battery))))))))))) (. .)))
Zinc sulfate is a grayish-white substance that is sometimes seen on the battery post of an automobile battery.
(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)))))))) (. .)))