( ( ( A turtle ) ( ( can not ) ( ( walk out ) ( of ( its shell ) ) ) ) ) ( , ( ( the carapace ) ( ( is ( fused ( with ( ( the ribs ) ( of ( the turtle ) ) ) ) ) ) . ) ) ) )
(ROOT (S (S (NP (DT A) (NN turtle)) (VP (MD can) (RB not) (VP (VB walk) (PRT (RP out)) (PP (IN of) (NP (PRP$ its) (NN shell)))))) (, ,) (NP (DT the) (NN carapace)) (VP (VBZ is) (VP (VBN fused) (PP (IN with) (NP (NP (DT the) (NNS ribs)) (PP (IN of) (NP (DT the) (NN turtle))))))) (. .)))
A turtle can not walk out of its shell, the carapace is fused with the ribs of the turtle.
(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)))))))) (. .)))