( ( ( ( ( John ( There ( are ( ( two types ) ( of diabetes ) ) ) ) ) , ) and ) ( they ( really ( ( are ( two quite ) ) ( different diseases ) ) ) ) ) . )
(ROOT (S (S (NP (NNP John)) (ADVP (RB There)) (VP (VBP are) (NP (NP (CD two) (NNS types)) (PP (IN of) (NP (NN diabetes)))))) (, ,) (CC and) (S (NP (PRP they)) (ADVP (RB really)) (VP (VBP are) (ADVP (NP (CD two)) (RB quite)) (NP (JJ different) (NNS diseases)))) (. .)))
John There are two types of diabetes, and they really are two quite different diseases.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD two) (JJ different) (JJ main) (NNS types)) (PP (IN of) (NP (NN diabetes))))) (. .)))