um pardon me
( ( um pardon ) me )
(ROOT (SINV (VP (VBP um) (NP (NN pardon))) (NP (PRP me))))
Sorry I burped, excuse me.
( Sorry ( I ( ( ( burped , ) ( excuse me ) ) . ) ) )
(ROOT (S (ADVP (RB Sorry)) (NP (PRP I)) (VP (VBD burped) (, ,) (S (VP (VB excuse) (NP (PRP me))))) (. .)))