( ( ( A cell ) ( not ( undergoing division ) ) ) . )
(ROOT (NP (NP (DT A) (NN cell)) (VP (RB not) (VBG undergoing) (NP (NN division))) (. .)))
A cell not undergoing division.
(ROOT (S (S (NP (DT All) (NNS cells)) (VP (VBP undergo) (NP (NN cell) (NN division)) (PP (IN during) (NP (DT a) (NN lifetime))))) (, ,) (CC but) (S (SBAR (WHADVP (WRB when)) (S (NP (DT this) (NN process)) (VP (VBZ is) (ADVP (RB out)) (PP (IN of) (NP (NN control)))))) (, ,) (NP (NN cancer)) (VP (VBZ results))) (. .)))