up walking out not only satisfied but 
(ROOT (PP (RP up) (VP (VP (VBG walking) (PRT (RP out)) (ADJP (CONJP (RB not) (RB only)) (JJ satisfied))) (CC but))))
(ROOT (PP (RP ) (VP (VP (VBG ) (PRT (RP )) (ADJP (CONJP (RB ) (RB )) (JJ ))) (CC ))))