( ( Has ( ( a nucleus ) ( lacking ( a ( nuclear membrane ) ) ) ) ) . )
(ROOT (S (VP (VB Has) (NP (NP (DT a) (NN nucleus)) (VP (VBG lacking) (NP (DT a) (JJ nuclear) (NN membrane))))) (. .)))
Has a nucleus lacking a nuclear membrane.
(ROOT (S (NP (NNP Nuclear) (NNP enevelope)) (VP (VBZ is) (NP (NP (DT a) (JJ double) (NN membrane)) (PP (IN of) (NP (NP (DT the) (NN nucleus)) (SBAR (WHNP (WDT that)) (S (VP (VBZ encloses) (NP (DT the) (JJ genetic) (NN material))))))))) (. .)))