( ( The spectra ) ( ( can ( be ( divided ( into ( seven subgroups ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN spectra)) (VP (MD can) (VP (VB be) (VP (VBN divided) (PP (IN into) (NP (CD seven) (NNS subgroups)))))) (. .)))
The spectra can be divided into seven subgroups.
(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.