But there's SOMETHING.
( But ( there ( ( 's SOMETHING ) . ) ) )
(ROOT (S (CC But) (NP (EX there)) (VP (VBZ 's) (VP (VBG SOMETHING))) (. .)))
Surely there's something.
( Surely ( there ( ( 's something ) . ) ) )
(ROOT (S (ADVP (RB Surely)) (NP (EX there)) (VP (VBZ 's) (NP (NN something))) (. .)))