( ( ( The ( only vertebrate ) ) ( in ( Oklahoma ( with ( ( a skeleton ) ( made ( of cartilage ) ) ) ) ) ) ) ( ( is ( the lamprey ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ only) (NN vertebrate)) (PP (IN in) (NP (NP (NNP Oklahoma)) (PP (IN with) (NP (NP (DT a) (NN skeleton)) (VP (VBN made) (PP (IN of) (NP (NN cartilage))))))))) (VP (VBZ is) (NP (DT the) (NN lamprey))) (. .)))
The only vertebrate in Oklahoma with a skeleton made of cartilage is the lamprey.
(ROOT (S (NP (JJ Lamprey) (NN cartilage)) (VP (VBZ contains) (NP (DT no) (NN collagen))) (. .)))