Not really, that's all.
( Not ( really ( , ( that ( ( 's all ) . ) ) ) ) )
(ROOT (S (RB Not) (ADVP (RB really)) (, ,) (NP (DT that)) (VP (VBZ 's) (NP (DT all))) (. .)))
That is really all.
( That ( ( ( is really ) all ) . ) )
(ROOT (S (NP (DT That)) (VP (VBZ is) (ADVP (RB really)) (NP (DT all))) (. .)))