( There ( ( ( are actually ) ( ( ( ( ( ( four phases ) , ) or ) stages ) , ) ( of ( ( HIV and ) AIDS ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (ADVP (RB actually)) (NP (NP (NP (CD four) (NNS phases)) (, ,) (CC or) (NP (NNS stages)) (, ,)) (PP (IN of) (NP (NNP HIV) (CC and) (NNP AIDS))))) (. .)))
There are actually four phases, or stages, of HIV and AIDS.
(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.