( T ( ( As ( ( the temperature ) ( of ( ( an amount ) ( of ( gas increases ) ) ) ) ) ) ( , ( ( so ( does ( ( its volume ) ( -LRB- ( ( maintaining ( a ( constant pressure ) ) ) -RRB- ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB T)) (PP (IN As) (NP (NP (DT the) (NN temperature)) (PP (IN of) (NP (NP (DT an) (NN amount)) (PP (IN of) (NP (NN gas) (NNS increases))))))) (, ,) (VP (ADVP (RB so)) (VBZ does) (NP (NP (PRP$ its) (NN volume)) (PRN (-LRB- -LRB-) (VP (VBG maintaining) (NP (DT a) (JJ constant) (NN pressure))) (-RRB- -RRB-)))) (. .)))
T As the temperature of an amount of gas increases, so does its volume (maintaining a constant pressure).
(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)))))) (. .)))