( Activities ( ( This class ) ( ( is ( ( divided up ) ( into ( seven ( weekly units ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Activities)) (NP (DT This) (NN class)) (VP (VBZ is) (VP (VBN divided) (PRT (RP up)) (PP (IN into) (NP (CD seven) (JJ weekly) (NNS units))))) (. .)))
Activities This class is divided up into seven weekly units.
(ROOT (S (NP (NNS Mollusks)) (VP (MD can) (VP (VB be) (VP (VBN divided) (PP (IN into) (NP (CD seven) (NNS classes)))))) (. .)))
Mollusks can be divided into seven classes.