sentence1_binary_parse: ( Vertebrates ( ( ( have ( ( ( ( ( a ( ( backbone or ) spine ) ) ( -LRB- ( ( vertebral column ) -RRB- ) ) ) , ) and ) ( amount ( to ( ( ( less ( than five ) ) percent ) ( of all ) ) ) ) ) ) ( described ( animal species ) ) ) . ) )
sentence1_parse: (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))) (. .)))
sentence1: Vertebrates have a backbone or spine ( vertebral column ), and amount to less than five percent of all described animal species .
sentence2_parse: (ROOT (S (NP (NNP Backbone)) (VP (VBZ is) (NP (NP (DT another) (NN name)) (PP (IN for) (NP (DT the) (JJ vertebral) (NN column))))) (. .)))
sentence2: Backbone is another name for the vertebral column.