I was a mistake.
( I ( ( was ( a mistake ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD was) (NP (DT a) (NN mistake))) (. .)))
I feel wanted. 
( I ( ( feel wanted ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP feel) (SBAR (S (VP (VBD wanted))))) (. .)))