that it ca n't help but engage an audience 
(ROOT (SBAR (IN that) (S (NP (PRP it)) (VP (MD ca) (RB n't) (VP (VB help) (CC but) (VP (VB engage) (NP (DT an) (NN audience))))))))
(ROOT (SBAR (IN ) (S (NP (PRP )) (VP (MD ) (RB ) (VP (VB ) (CC ) (VP (VB ) (NP (DT ) (NN ))))))))