( ( Contrast ( ( the structures ) ( of ( ( ( ( ( ( prokaryotic cells ) , ) ( eukaryotic ( animal cells ) ) ) , ) and ) ( eukaryotic ( plant cells ) ) ) ) ) ) . )
(ROOT (S (VP (VB Contrast) (NP (NP (DT the) (NNS structures)) (PP (IN of) (NP (NP (JJ prokaryotic) (NNS cells)) (, ,) (NP (JJ eukaryotic) (NN animal) (NNS cells)) (, ,) (CC and) (NP (JJ eukaryotic) (NN plant) (NNS cells)))))) (. .)))
Contrast the structures of prokaryotic cells, eukaryotic animal cells, and eukaryotic plant cells.
(ROOT (S (NP (DT A) (NN cell) (NN wall)) (VP (VBZ is) (VP (VBN found) (PP (PP (IN in) (NP (DT a) (NN plant) (NN cell))) (CONJP (CC but) (RB not)) (PP (IN in) (NP (DT an) (NN animal) (NN cell)))))) (. .)))
A cell wall is found in a plant cell but not in an animal cell.