( ( While ( ( the mitochondrion ) ( has ( two ( membrane systems ) ) ) ) ) ( , ( ( the chloroplast ) ( ( ( ( has three ) , ) ( forming ( three compartments ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN While) (S (NP (DT the) (NN mitochondrion)) (VP (VBZ has) (NP (CD two) (JJ membrane) (NNS systems))))) (, ,) (NP (DT the) (NN chloroplast)) (VP (VBZ has) (NP (CD three)) (, ,) (S (VP (VBG forming) (NP (CD three) (NNS compartments))))) (. .)))
While the mitochondrion has two membrane systems, the chloroplast has three, forming three compartments.
(ROOT (S (NP (CD Two) (NNS membranes)) (VP (VBP form) (NP (NP (DT the) (NN mitochondrion) (NN structure)) (PP (IN of) (NP (DT a) (NN cell))))) (. .)))