figures out how to make us share their enthusiasm . 
(ROOT (S (VP (VBZ figures) (PRT (RP out)) (SBAR (WHADVP (WRB how)) (S (VP (TO to) (VP (VB make) (S (NP (PRP us)) (VP (VB share) (NP (PRP$ their) (NN enthusiasm))))))))) (. .)))
(ROOT (S (VP (VBZ ) (PRT (RP )) (SBAR (WHADVP (WRB )) (S (VP (TO ) (VP (VB ) (S (NP (PRP )) (VP (VB ) (NP (PRP$ ) (NN ))))))))) (. )))