( Mitosis ( ( is ( classically ( divided ( into ( four stages ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Mitosis)) (VP (VBZ is) (ADJP (RB classically) (VBN divided) (PP (IN into) (NP (CD four) (NNS stages))))) (. .)))
Mitosis is classically divided into four stages.
(ROOT (S (NP (NNS Mitosis)) (ADVP (RB actually)) (VP (VBZ occurs) (PP (IN in) (NP (CD four) (NNS phases)))) (. .)))
Mitosis actually occurs in four phases.