( ( ( The ( eel 's ) ) ( life cycle ) ) ( ( can ( be ( divided ( into ( seven stages ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN eel) (POS 's)) (NN life) (NN cycle)) (VP (MD can) (VP (VB be) (VP (VBN divided) (PP (IN into) (NP (CD seven) (NNS stages)))))) (. .)))
The eel's life cycle can be divided into seven stages.
(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.