( ( The ( water ( vascular system ) ) ) ( ( is ( one ( of ( ( the ( many ( coelomic subcompartments ) ) ) ( of echinoderms ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN water) (NN vascular) (NN system)) (VP (VBZ is) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT the) (JJ many) (JJ coelomic) (NNS subcompartments)) (PP (IN of) (NP (NNS echinoderms))))))) (. .)))
The water vascular system is one of the many coelomic subcompartments of echinoderms.
(ROOT (S (NP (NNS Echinoderms)) (VP (VBP possess) (NP (DT a) (JJ water-based) (NN circulatory) (NN system))) (. .)))