( Vertebrates ( ( possess ( ( a ( backbone-a ( dorsal ( vertebral column ) ) ) ) ( enclosing ( a ( dorsal ( hollow ( nerve cord ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Vertebrates)) (VP (VBP possess) (NP (NP (DT a) (JJ backbone-a) (JJ dorsal) (NN vertebral) (NN column)) (VP (VBG enclosing) (NP (DT a) (JJ dorsal) (JJ hollow) (NN nerve) (NN cord))))) (. .)))
Vertebrates possess a backbone-a dorsal vertebral column enclosing a dorsal hollow nerve cord.
(ROOT (S (NP (NNP Backbone)) (VP (VBZ is) (NP (NP (DT another) (NN name)) (PP (IN for) (NP (DT the) (JJ vertebral) (NN column))))) (. .)))
Backbone is another name for the vertebral column.