Um, not really anything unusual.
( ( ( Um , ) ( ( not really ) ( anything unusual ) ) ) . )
(ROOT (NP (NP (NNP Um)) (, ,) (NP (NP (RB not) (RB really)) (ADJP (NN anything) (JJ unusual))) (. .)))
Probably not something strange.
( Probably ( ( not ( something strange ) ) . ) )
(ROOT (FRAG (ADVP (RB Probably)) (NP (RB not) (NN something) (NNS strange)) (. .)))