( Origin ( of ( ( Prokaryotic and ) ( Eukaryotic ( Cells A. ) ) ) ) )
(ROOT (NP (NP (NNP Origin)) (PP (IN of) (NP (NP (NNP Prokaryotic)) (CC and) (NP (NNP Eukaryotic) (NNPS Cells) (NNP A.))))))
Origin of Prokaryotic and Eukaryotic Cells A.
(ROOT (S (NP (NP (DT The) (JJ main) (NN difference)) (PP (IN between) (NP (ADJP (JJ eukaryotic) (CC and) (JJ prokaryotic)) (NNS cells)))) (VP (VBZ is) (SBAR (IN that) (S (NP (JJ eukaryotic) (NNS cells)) (VP (VBP have) (NP (DT a) (NN nucleus)))))) (. .)))