you know there 's something there . 
(ROOT (S (NP (PRP you)) (VP (VBP know) (SBAR (S (NP (EX there)) (VP (VBZ 's) (NP (NN something)) (ADVP (RB there)))))) (. .)))
(ROOT (S (NP (PRP )) (VP (VBP ) (SBAR (S (NP (EX )) (VP (VBZ ) (NP (NN )) (ADVP (RB )))))) (. )))