( ( ( a cell ) ( that does ) ) ( ( have ( a ( nucleus 7 ) ) ) . ) )
(ROOT (S (NP (NP (DT a) (NN cell)) (SBAR (WHNP (WDT that)) (S (VP (VBZ does))))) (VP (VBP have) (NP (DT a) (NN nucleus) (CD 7))) (. .)))
a cell that does have a nucleus 7.
(ROOT (S (NP (NP (DT The) (NNS cells)) (PP (IN of) (NP (DT all) (NNS protists)))) (VP (VBP have) (NP (DT a) (NN nucleus))) (. .)))