( ( The ( compressed gases ) ) ( ( create ( ( a force ) ( that ( ( causes ( the ( ambient ( air pressure ) ) ) ) ( to increase ) ) ) ) ) ; ) )
(ROOT (S (NP (DT The) (VBN compressed) (NNS gases)) (VP (VBP create) (NP (NP (DT a) (NN force)) (SBAR (WHNP (WDT that)) (S (VP (VBZ causes) (NP (DT the) (JJ ambient) (NN air) (NN pressure)) (S (VP (TO to) (VP (VB increase))))))))) (: ;)))
The compressed gases create a force that causes the ambient air pressure to increase;
(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)))))) (. .)))