wondering why these people mattered 
(ROOT (S (VP (VBG wondering) (SBAR (WHADVP (WRB why)) (S (NP (DT these) (NNS people)) (VP (VBD mattered)))))))
(ROOT (S (VP (VBG ) (SBAR (WHADVP (WRB )) (S (NP (DT ) (NNS )) (VP (VBD )))))))