( skeleton ( ( made ( of ( cartilage 2 ) ) ) . ) )
(ROOT (S (NP (NN skeleton)) (VP (VBD made) (PP (IN of) (NP (NN cartilage) (CD 2)))) (. .)))
skeleton made of cartilage 2.
(ROOT (S (ADVP (RB Early) (PP (IN in) (NP (NP (DT the) (NN development)) (PP (IN of) (NP (DT a) (JJ human) (NN fetus)))))) (, ,) (NP (DT the) (NN skeleton)) (VP (VBZ is) (VP (VBN made) (ADVP (RB entirely)) (PP (IN of) (NP (NN cartilage))))) (. .)))