yeah really no kidding
( ( yeah really ) ( no kidding ) )
(ROOT (SINV (VP (VBP yeah) (ADVP (RB really))) (NP (DT no) (NN kidding))))
Oh, you're just joking. 
( Oh ( , ( you ( ( ( 're just ) joking ) . ) ) ) )
(ROOT (S (INTJ (UH Oh)) (, ,) (NP (PRP you)) (VP (VBP 're) (ADVP (RB just)) (VP (VBG joking))) (. .)))