( Mollusks ( ( are ( invertebrates ( such ( as ( snails ( , ( scallops ( , ( and squids ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Mollusks)) (VP (VBP are) (NP (NP (NNS invertebrates)) (PP (JJ such) (IN as) (NP (NNS snails) (, ,) (NNS scallops) (, ,) (CC and) (NNS squids))))) (. .)))
Mollusks are invertebrates such as snails, scallops, and squids.
(ROOT (S (NP (DT A) (NN scallop)) (VP (VBZ is) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN mollusk))) (. .)))