( There ( ( are ( ( ( ( ( ( ( two types ) ( of cells ) ) , ) ( ( eukaryotes , ) ( which ( contain ( a nucleus ) ) ) ) ) , ) and ) ( ( prokaryotes , ) ( which ( do not ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (NP (CD two) (NNS types)) (PP (IN of) (NP (NNS cells)))) (, ,) (NP (NP (NNS eukaryotes)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP contain) (NP (DT a) (NN nucleus)))))) (, ,) (CC and) (NP (NP (NNS prokaryotes)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP do) (RB not))))))) (. .)))
There are two types of cells, eukaryotes, which contain a nucleus, and prokaryotes, which do not.
(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)))))) (. .)))