( They ( ( have ( to ( eat ( in ( three ( or ( four cycles ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP have) (S (VP (TO to) (VP (VB eat) (PP (IN in) (NP (CD three) (CC or) (CD four) (NNS cycles))))))) (. .)))
They have to eat in three or four cycles.
(ROOT (S (NP (NNS Cells)) (VP (VBP have) (NP (CD four) (NNS cycles))) (. .)))