( ( The clam ) ( ( has ( a ( three-chambered heart ) ) ) . ) )
(ROOT (S (NP (DT The) (NN clam)) (VP (VBZ has) (NP (DT a) (JJ three-chambered) (NN heart))) (. .)))
The clam has a three-chambered heart.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD three) (NNS chambers)) (PP (IN in) (NP (DT a) (JJ reptiles) (NN heart))))) (. .)))