( ( ( ( Plasmas , ) ( considered ( ( the ( fourth state ) ) ( of matter ) ) ) ) , ) ( ( ( comprise ( most ( of ( the universe ) ) ) ) ( by volume ) ) . ) )
(ROOT (S (NP (NP (NNS Plasmas)) (, ,) (VP (VBN considered) (NP (NP (DT the) (JJ fourth) (NN state)) (PP (IN of) (NP (NN matter))))) (, ,)) (VP (VBP comprise) (NP (NP (JJS most)) (PP (IN of) (NP (DT the) (NN universe)))) (PP (IN by) (NP (NN volume)))) (. .)))
Plasmas, considered the fourth state of matter, comprise most of the universe by volume.
(ROOT (S (NP (NNP Plasma) (NN matter)) (VP (VBZ makes) (PRT (RP up)) (NP (NP (JJS most)) (PP (IN of) (NP (DT the) (NN universe))))) (. .)))
Plasma matter makes up most of the universe.