( ( Unlike ( ( most vertebrate ) cartilage ) ) ( , ( ( lamprey cartilage ) ( ( contains ( no collagen ) ) . ) ) ) )
(ROOT (S (PP (IN Unlike) (NP (ADJP (RBS most) (JJ vertebrate)) (NN cartilage))) (, ,) (NP (JJ lamprey) (NN cartilage)) (VP (VBZ contains) (NP (DT no) (NN collagen))) (. .)))
Unlike most vertebrate cartilage, lamprey cartilage contains no collagen.
(ROOT (S (NP (JJ Lamprey) (NN cartilage)) (VP (VBZ contains) (NP (DT no) (NN collagen))) (. .)))