( ( Irregular bones ) ( ( are ( found ( in ( ( ( ( ( ( your backbone ) ( -LRB- ( vertebrae -RRB- ) ) ) , ) wrists ) and ) ankles ) ) ) ) . ) )
(ROOT (S (NP (NNP Irregular) (NNS bones)) (VP (VBP are) (VP (VBN found) (PP (IN in) (NP (NP (PRP$ your) (NN backbone)) (PRN (-LRB- -LRB-) (NP (NN vertebrae)) (-RRB- -RRB-)) (, ,) (NP (NNS wrists)) (CC and) (NP (NNS ankles)))))) (. .)))
Irregular bones are found in your backbone (vertebrae), wrists and ankles.
(ROOT (S (NP (NNP Vertebrata)) (VP (VBP are) (VP (VBN characterized) (PP (IN by) (NP (NP (DT the) (NN presence)) (PP (IN of) (NP (NN backbone))))))) (. .)))
Vertebrata are characterized by the presence of backbone.