( We ( ( ( ( ( find ( a ( clean ( cartilage skull ) ) ) ) , ) possibly ) ( of ( a dogfish ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBP find) (NP (DT a) (JJ clean) (NN cartilage) (NN skull)) (, ,) (ADVP (RB possibly)) (PP (IN of) (NP (DT a) (NN dogfish)))) (. .)))
We find a clean cartilage skull, possibly of a dogfish.
(ROOT (S (NP (NNS Hagfishes)) (VP (VBP have) (NP (NP (DT a) (NN skull)) (VP (VBN made) (PP (IN of) (NP (NN cartilage)))))) (. .)))