knows how to tell us about people 
(ROOT (S (VP (VBZ knows) (SBAR (WHADVP (WRB how)) (S (VP (TO to) (VP (VB tell) (NP (PRP us)) (PP (IN about) (NP (NNS people))))))))))
(ROOT (S (VP (VBZ ) (SBAR (WHADVP (WRB )) (S (VP (TO ) (VP (VB ) (NP (PRP )) (PP (IN ) (NP (NNS ))))))))))