( Actually ( , ( they ( ( are ( ( a type ) ( of ( ( mollusk , ) ( called ( a cephalopod ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Actually)) (, ,) (NP (PRP they)) (VP (VBP are) (NP (NP (DT a) (NN type)) (PP (IN of) (NP (NP (NN mollusk)) (, ,) (VP (VBN called) (NP (DT a) (NN cephalopod))))))) (. .)))
Actually, they are a type of mollusk, called a cephalopod.
(ROOT (S (NP (DT A) (NN scallop)) (VP (VBZ is) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN mollusk))) (. .)))