( ( If ( ( ( the amount ) ( of ( gas ( in ( a container ) ) ) ) ) ( is increased ) ) ) ( , ( ( the volume ) ( increases . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NP (NN gas)) (PP (IN in) (NP (DT a) (NN container)))))) (VP (VBZ is) (VP (VBN increased))))) (, ,) (NP (DT the) (NN volume)) (VP (VBZ increases)) (. .)))
If the amount of gas in a container is increased, the volume increases.
(ROOT (S (PP (IN From) (NP (NP (NNS observations)) (ADJP (RB as) (JJ simple) (PP (IN as) (S (VP (VBG blowing) (PRT (RP up)) (NP (DT a) (NN balloon)))))))) (, ,) (NP (PRP it)) (VP (VBZ is) (ADJP (JJ clear)) (SBAR (IN that) (S (S (VP (VBG increasing) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NN gas)))))) (VP (VBZ increases) (NP (DT the) (NN volume)))))) (. .)))