( ( ( The class ) ( of mollusk ) ) ( ( called ( Bivalvia ( includes ( ( ( ( ( ( ( clams , ) oysters ) , ) mussels ) , ) and ) scallops ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN class)) (PP (IN of) (NP (NN mollusk)))) (VP (VBD called) (SBAR (S (NP (NNP Bivalvia)) (VP (VBZ includes) (NP (NP (NNS clams)) (, ,) (NP (NNS oysters)) (, ,) (NP (NNS mussels)) (, ,) (CC and) (NP (NNS scallops))))))) (. .)))
The class of mollusk called Bivalvia includes clams, oysters, mussels , and scallops.
(ROOT (S (NP (DT A) (NN scallop)) (VP (VBZ is) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN mollusk))) (. .)))