( ( The ( extant echinoderms ) ) ( ( are ( divided ( into ( ( five clades ) ( including ( ( ( ( ( ( ( ( ( ( ( the ( Sea Lilies ) ) ( -LRB- ( Crinoidea -RRB- ) ) ) , ) ( Starfish ( -LRB- ( Asteroidea -RRB- ) ) ) ) , ) ( ( Brittle Stars ) ( -LRB- ( Ophiuroidea -RRB- ) ) ) ) , ) ( ( Sea Urchins ) ( -LRB- ( Echinoidea -RRB- ) ) ) ) , ) and ) ( ( Sea Cucumbers ) ( -LRB- ( Holothuroidea -RRB- ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ extant) (NNS echinoderms)) (VP (VBP are) (VP (VBN divided) (PP (IN into) (NP (NP (CD five) (NNS clades)) (PP (VBG including) (NP (NP (NP (DT the) (NNP Sea) (NNP Lilies)) (PRN (-LRB- -LRB-) (NP (NNP Crinoidea)) (-RRB- -RRB-))) (, ,) (NP (NP (NNP Starfish)) (PRN (-LRB- -LRB-) (NP (NNP Asteroidea)) (-RRB- -RRB-))) (, ,) (NP (NP (NNP Brittle) (NNP Stars)) (PRN (-LRB- -LRB-) (NP (NNP Ophiuroidea)) (-RRB- -RRB-))) (, ,) (NP (NP (NNP Sea) (NNP Urchins)) (PRN (-LRB- -LRB-) (NP (NNP Echinoidea)) (-RRB- -RRB-))) (, ,) (CC and) (NP (NP (NNP Sea) (NNP Cucumbers)) (PRN (-LRB- -LRB-) (NP (NNP Holothuroidea)) (-RRB- -RRB-))))))))) (. .)))
The extant echinoderms are divided into five clades including the Sea Lilies (Crinoidea), Starfish (Asteroidea), Brittle Stars (Ophiuroidea), Sea Urchins (Echinoidea), and Sea Cucumbers (Holothuroidea).
(ROOT (S (NP (VBG Living) (NNS echinoderms)) (VP (VBD aredivided) (PP (IN into) (NP (CD five) (NNS clades)))) (. .)))