( It ( ( shows ( ( that solubility ) ( of ( oxygen ( in ( ( water increases ) ( with ( decreased temperatures ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ shows) (NP (NP (DT that) (NN solubility)) (PP (IN of) (NP (NP (NN oxygen)) (PP (IN in) (NP (NP (NN water) (NNS increases)) (PP (IN with) (NP (VBN decreased) (NNS temperatures))))))))) (. .)))
It shows that solubility of oxygen in water increases with decreased temperatures.
(ROOT (S (SBAR (IN If) (S (NP (DT a) (NN solute)) (VP (VBZ is) (NP (DT a) (NN gas))))) (, ,) (S (VP (VBG increasing) (NP (DT the) (NN temperature)))) (VP (MD will) (VP (VB decrease) (NP (PRP$ its) (NN solubility)))) (. .)))