it 's up to ( watts ) to lend credibility to this strange scenario , and her presence succeeds in making us believe . 
(ROOT (S (S (NP (NP (PRP it))) (VP (VBZ 's) (ADVP (RB up) (PP (IN to) (-LRB- -LRB-) (NP (NNS watts)) (-RRB- -RRB-))) (S (VP (TO to) (VP (VB lend) (NP (NN credibility)) (PP (IN to) (NP (DT this) (JJ strange) (NN scenario)))))))) (, ,) (CC and) (S (NP (PRP$ her) (NN presence)) (VP (VBZ succeeds) (PP (IN in) (S (VP (VBG making) (S (NP (PRP us)) (VP (VB believe)))))))) (. .)))
(ROOT (S (S (NP (NP (PRP ))) (VP (VBZ ) (ADVP (RB ) (PP (IN ) (-LRB- ) (NP (NNS )) (-RRB- ))) (S (VP (TO ) (VP (VB ) (NP (NN )) (PP (IN ) (NP (DT ) (JJ ) (NN )))))))) (, ) (CC ) (S (NP (PRP$ ) (NN )) (VP (VBZ ) (PP (IN ) (S (VP (VBG ) (S (NP (PRP )) (VP (VB )))))))) (. )))