( ( 4 Cells ) ( ( come ( from ( preexisting cells ) ) ) . ) )
(ROOT (S (NP (CD 4) (NNS Cells)) (VP (VBP come) (PP (IN from) (NP (VBG preexisting) (NNS cells)))) (. .)))
4 Cells come from preexisting cells.
(ROOT (S (NP (NNS Cells)) (VP (VBP come) (PP (IN from) (NP (VBG preexisting) (NNS cells)))) (. .)))