( There ( ( were ( ( two ( main types ) ) ( of diabetes ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBD were) (NP (NP (CD two) (JJ main) (NNS types)) (PP (IN of) (NP (NN diabetes))))) (. .)))
There were two main types of diabetes.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD two) (JJ different) (JJ main) (NNS types)) (PP (IN of) (NP (NN diabetes))))) (. .)))