( Mitosis ( ( consists ( of ( four stages ) ) ) . ) )
(ROOT (S (NP (NNS Mitosis)) (VP (VBZ consists) (PP (IN of) (NP (CD four) (NNS stages)))) (. .)))
Mitosis consists of 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.