( ( the ( increasing ( water pressure ) ) ) ( ( compresses ( ( the air ) ( in ( the lungs ) ) ) ) . ) )
(ROOT (S (NP (DT the) (VBG increasing) (NN water) (NN pressure)) (VP (VBZ compresses) (NP (NP (DT the) (NN air)) (PP (IN in) (NP (DT the) (NNS lungs))))) (. .)))
the increasing water pressure compresses the air in the lungs.
(ROOT (S (SBAR (IN As) (S (NP (DT a) (NN diver)) (VP (VBZ descends)))) (, ,) (NP (NP (DT the) (NN increase)) (PP (IN in) (NP (NN pressure)))) (VP (VBZ causes) (NP (NP (DT the) (NN body) (POS 's)) (NN air) (NNS pockets)) (PP (IN in) (NP (NP (DT the) (NNS ears) (CC and) (NNS lungs)) (PP (TO to) (NP (NNS compress)))))) (. .)))