( ( Recommended Activites ) ( ( ( Divide ( the class ) ) ( into ( seven groups ) ) ) . ) )
(ROOT (S (NP (NNP Recommended) (NNP Activites)) (VP (VB Divide) (NP (DT the) (NN class)) (PP (IN into) (NP (CD seven) (NNS groups)))) (. .)))
Recommended Activites Divide the class into seven groups.
(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.