It's just not me.
( It ( ( ( 's ( just not ) ) me ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ 's) (ADVP (RB just) (RB not)) (NP (PRP me))) (. .)))
I'm not the only one.
( I ( ( ( 'm not ) ( the ( only one ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP 'm) (RB not) (NP (DT the) (JJ only) (NN one))) (. .)))