( ( As ( the ( water deepens ) ) ) ( , ( ( the pressure ) ( increases . ) ) ) )
(ROOT (S (PP (IN As) (NP (DT the) (NN water) (NNS deepens))) (, ,) (NP (DT the) (NN pressure)) (VP (VBZ increases)) (. .)))
As the water deepens, the pressure increases.
(ROOT (S (NP (NP (DT The) (NN pressure)) (PP (IN of) (NP (NN ocean) (NN water)))) (VP (VBZ increases) (ADVP (RB rapidly)) (SBAR (IN as) (S (NP (DT the) (NN water)) (VP (VBZ gets) (ADVP (RBR deeper)))))) (. .)))