( ( The ( classic disease ) ) ( ( is ( divided ( into ( three stages ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ classic) (NN disease)) (VP (VBZ is) (VP (VBN divided) (PP (IN into) (NP (CD three) (NNS stages))))) (. .)))
The classic disease is divided into three stages.
(ROOT (S (NP (NNP Adulthood)) (VP (VBZ is) (VP (VBN divided) (PP (IN into) (NP (CD three) (NNS stages))))) (. .)))