( Scallops ( , ( ( like ( ( clams and ) oysters ) ) ( , ( ( are ( mollusks ( having ( two shells ) ) ) ) . ) ) ) ) )
(ROOT (S (NP (NNS Scallops)) (, ,) (PP (IN like) (NP (NNS clams) (CC and) (NNS oysters))) (, ,) (VP (VBP are) (VP (ADVP (RB mollusks)) (VBG having) (NP (CD two) (NNS shells)))) (. .)))
Scallops, like clams and oysters, are mollusks having two shells.
(ROOT (S (NP (DT A) (NN scallop)) (VP (VBZ is) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN mollusk))) (. .)))