( Turtles ( ( are ( reptiles ( of ( ( the order ) ( ( ( Chelonii or ) Testudines ) ( ( ( characterised ( by ( ( a ( special ( bony ( or ( cartilaginous shell ) ) ) ) ) ( developed ( from ( their ribs ) ) ) ) ) ) and ) ( acting ( as ( a shield ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Turtles)) (VP (VBP are) (NP (NP (NNS reptiles)) (PP (IN of) (NP (NP (DT the) (NN order)) (SBAR (S (NP (NNP Chelonii) (CC or) (NNP Testudines)) (VP (VP (VBN characterised) (PP (IN by) (NP (NP (DT a) (JJ special) (NN bony) (CC or) (NNS cartilaginous) (NN shell)) (VP (VBN developed) (PP (IN from) (NP (PRP$ their) (NNS ribs))))))) (CC and) (VP (VBG acting) (PP (IN as) (NP (DT a) (NN shield))))))))))) (. .)))
Turtles are reptiles of the order Chelonii or Testudines characterised by a special bony or cartilaginous shell developed from their ribs and acting as a shield.
(ROOT (S (NP (JJS Most) (NN turtle) (NNS bodies)) (VP (VBP are) (VP (VBN covered) (PP (IN by) (NP (NP (DT a) (JJ special) (NN bony) (CC or) (NNS cartilaginous) (NN shell)) (VP (VBN developed) (PP (IN from) (NP (PRP$ their) (NNS ribs)))))))) (. .)))