( Vertebrates ( ( ( have ( ( ( ( ( a ( ( backbone or ) spine ) ) ( -LRB- ( ( vertebral column ) -RRB- ) ) ) , ) and ) ( amount ( to ( ( ( less ( than five ) ) percent ) ( of all ) ) ) ) ) ) ( described ( animal species ) ) ) . ) )
(ROOT (SINV (ADVP (RB Vertebrates)) (VBP have) (NP (NP (DT a) (NN backbone) (CC or) (NN spine)) (PRN (-LRB- -LRB-) (NP (JJ vertebral) (NN column)) (-RRB- -RRB-)) (, ,) (CC and) (NP (NP (NN amount)) (PP (TO to) (NP (NP (QP (JJR less) (IN than) (CD five)) (NN percent)) (PP (IN of) (NP (DT all))))))) (VP (VBN described) (NP (NN animal) (NNS species))) (. .)))
Vertebrates have a backbone or spine ( vertebral column ), and amount to less than five percent of all described animal species .
(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.