( ( All ( living cells ) ) ( ( have ( ( a ( plasma membrane ) ) ( that ( encloses ( their contents ) ) ) ) ) . ) )
(ROOT (S (NP (DT All) (VBG living) (NNS cells)) (VP (VBP have) (NP (NP (DT a) (NN plasma) (NN membrane)) (SBAR (WHNP (WDT that)) (S (VP (VBZ encloses) (NP (PRP$ their) (NNS contents))))))) (. .)))
All living cells have a plasma membrane that encloses their contents.
(ROOT (S (NP (NP (DT All) (NNS types)) (PP (IN of) (NP (NNS cells)))) (VP (VBP are) (VP (VBN enclosed) (PP (IN by) (NP (DT a) (NN membrane))))) (. .)))
All types of cells are enclosed by a membrane.