( ( ( ( not ( ( easily changing ) shape ) ) ; ) ( not ( in ( ( the form ) ( of ( ( liquid or ) gas ) ) ) ) ) ) . )
(ROOT (NP (NP (RB not) (ADJP (RB easily) (VBG changing)) (NN shape)) (: ;) (NP (NP (RB not)) (PP (IN in) (NP (NP (DT the) (NN form)) (PP (IN of) (NP (NN liquid) (CC or) (NN gas)))))) (. .)))
not easily changing shape; not in the form of liquid or gas.
(ROOT (S (NP (DT A) (NN gas)) (VP (VBZ assumes) (NP (NP (DT the) (NN shape)) (PP (IN of) (NP (PRP$ its) (NN container))))) (. .)))