opened it up for all of us 
(ROOT (VP (VBD opened) (NP (PRP it)) (PRT (RP up)) (PP (IN for) (NP (NP (DT all)) (PP (IN of) (NP (PRP us)))))))
(ROOT (VP (VBD ) (NP (PRP )) (PRT (RP )) (PP (IN ) (NP (NP (DT )) (PP (IN ) (NP (PRP )))))))