( liquid ( ( ( changes ( into solid ) ) ( by ( decrease ( in temperature ) ) ) ) . ) )
(ROOT (S (NP (NN liquid)) (VP (VBZ changes) (PP (IN into) (ADJP (JJ solid))) (PP (IN by) (NP (NP (NN decrease)) (PP (IN in) (NP (NN temperature)))))) (. .)))
liquid changes into solid by decrease in temperature.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NP (DT the) (NN solubility)) (PP (IN of) (NP (NP (NNS gases)) (PP (IN in) (NP (NNS liquids)))))) (VP (VBZ changes) (PP (IN with) (NP (VBG increasing) (NN temperature)))))) (, ,) (NP (PRP it)) (VP (VBZ decreases)) (. .)))