( Lethargy ( ( ( may ultimately ) ( ( ( progress ( to ( a coma ) ) ) , ) ( though ( this ( is ( more ( common ( in ( ( type ( 2 diabetes ) ) ( than ( type 1 ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Lethargy)) (VP (MD may) (ADVP (RB ultimately)) (VP (VB progress) (PP (TO to) (NP (DT a) (NN coma))) (, ,) (SBAR (IN though) (S (NP (DT this)) (VP (VBZ is) (ADJP (RBR more) (JJ common) (PP (IN in) (NP (NP (NN type) (CD 2) (NN diabetes)) (PP (IN than) (NP (NN type) (CD 1))))))))))) (. .)))
Lethargy may ultimately progress to a coma, though this is more common in type 2 diabetes than type 1.
(ROOT (S (NP (NNP Type) (CD 2)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBR more) (JJ common)) (NN type)) (PP (IN of) (NP (NN diabetes))))) (. .)))