But his white tree of class had stepping up .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (CC_0 But) (NP_1 (NP_6 (ATNP_1 (PRPDOLLAR_0 his) (JJ_0 white)) (NN_1 tree)) (PP_0 (IN_1 of) (NP_2 (NN_3 class))))) (VP_3 (VBD_1 had) (VP_2 (VBG_0 stepping) (PRT_0 (RP_0 up))))) (DOT_0 .)))