( Matter ( ( can ( exist ( as ( ( ( ( ( ( ( ( a solid ) , ) ( a liquid ) ) , ) ( a gas ) ) , ) or ) ( as plasma ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Matter)) (VP (MD can) (VP (VB exist) (PP (IN as) (NP (NP (DT a) (JJ solid)) (, ,) (NP (DT a) (NN liquid)) (, ,) (NP (DT a) (NN gas)) (, ,) (CC or) (NP (RB as) (NN plasma)))))) (. .)))
Matter can exist as a solid , a liquid , a gas , or as plasma .
(ROOT (S (NP (NNP Plasma)) (VP (VBZ completes) (NP (NP (DT the) (NN list)) (: :) (NP (ADJP (ADJP (JJ solid)) (, ,) (ADJP (JJ liquid)) (, ,)) (NN gas)))) (. .)))