( There ( ( are ( ( four phases ) ( of ( mitosis ( that ( occur ( during ( the process ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD four) (NNS phases)) (PP (IN of) (NP (NP (NNS mitosis)) (SBAR (WHNP (WDT that)) (S (VP (VBP occur) (PP (IN during) (NP (DT the) (NN process)))))))))) (. .)))
There are four phases of mitosis that occur during the process.
(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.