I'm confused.
( I ( ( 'm confused ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP 'm) (ADJP (VBN confused))) (. .)))
Not all of it is very clear to me.
( ( ( Not all ) ( of it ) ) ( ( is ( very ( clear ( to me ) ) ) ) . ) )
(ROOT (S (NP (NP (RB Not) (DT all)) (PP (IN of) (NP (PRP it)))) (VP (VBZ is) (ADJP (RB very) (JJ clear) (PP (TO to) (NP (PRP me))))) (. .)))