( ( ( A ( shark 's ) ) ( entire skeleton ) ) ( ( is ( made ( of ( cartilage ( -- ( not bone ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (NN shark) (POS 's)) (JJ entire) (NN skeleton)) (VP (VBZ is) (VP (VBN made) (PP (IN of) (NP (NP (NN cartilage)) (PRN (: --) (RB not) (NP (NN bone))))))) (. .)))
A shark's entire skeleton is made of cartilage -- not bone.
(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))))) (. .)))