( ( ( Stem cells ) ( from ( the epithelial ) ) ) ( ( ( lineages cycle ) ( ( every ( ( three to ) four ) ) days ) ) . ) )
(ROOT (S (NP (NP (JJ Stem) (NNS cells)) (PP (IN from) (NP (DT the) (NN epithelial)))) (VP (VBZ lineages) (NP (NN cycle)) (NP (QP (DT every) (CD three) (TO to) (CD four)) (NNS days))) (. .)))
Stem cells from the epithelial lineages cycle every three to four days.
(ROOT (S (NP (NNS Cells)) (VP (VBP have) (NP (CD four) (NNS cycles))) (. .)))