( ( The ( chemical tank ) ) ( ( ( ( held ( ( 40 gallons ) ( of ( ( ( bicarbonate ( soda ( and ( water solution ) ) ) ) , ) ( ( to which ) ( ( sulfuric acid ) ( was ( added ( at ( the ( fire scene ) ) ) ) ) ) ) ) ) ) ) , ) ( ( creating ( carbon ( dioxide gas ) ) ) ( to ( ( force ( the water ) ) ( from ( the tank ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN chemical) (NN tank)) (VP (VBD held) (NP (NP (CD 40) (NNS gallons)) (PP (IN of) (NP (NP (JJ bicarbonate) (NN soda) (CC and) (NN water) (NN solution)) (, ,) (SBAR (WHPP (TO to) (WHNP (WDT which))) (S (NP (JJ sulfuric) (NN acid)) (VP (VBD was) (VP (VBN added) (PP (IN at) (NP (DT the) (NN fire) (NN scene)))))))))) (, ,) (S (VP (VBG creating) (NP (NN carbon) (NN dioxide) (NN gas)) (S (VP (TO to) (VP (VB force) (NP (DT the) (NN water)) (PP (IN from) (NP (DT the) (NN tank))))))))) (. .)))
The chemical tank held 40 gallons of bicarbonate soda and water solution, to which sulfuric acid was added at the fire scene, creating carbon dioxide gas to force the water from the tank.
(ROOT (S (NP (NNP Carbon) (NN dioxide)) (ADVP (RB chemically)) (VP (VBP weather) (NP (NNS rocks)) (PP (IN by) (S (VP (VBG creating) (NP (NNS acids)))))) (. .)))