( ( The symptoms ) ( ( are ( divided ( into ( three stages ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS symptoms)) (VP (VBP are) (VP (VBN divided) (PP (IN into) (NP (CD three) (NNS stages))))) (. .)))
The symptoms are divided into three stages.
(ROOT (S (NP (NNP Adulthood)) (VP (VBZ is) (VP (VBN divided) (PP (IN into) (NP (CD three) (NNS stages))))) (. .)))