( ( The ( volatile matter ) ) ( ( is ( in ( ( the form ) ( of ( ( gas and ) liquid ) ) ) ) ) ; ) )
(ROOT (S (NP (DT The) (JJ volatile) (NN matter)) (VP (VBZ is) (PP (IN in) (NP (NP (DT the) (NN form)) (PP (IN of) (NP (NN gas) (CC and) (NN liquid)))))) (: ;)))
The volatile matter is in the form of gas and liquid;
(ROOT (S (NP (DT A) (NN gas)) (VP (VBZ assumes) (NP (NP (DT the) (NN shape)) (PP (IN of) (NP (PRP$ its) (NN container))))) (. .)))