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 )))))))))))