a dirt guess she refer back `` doing really of He .
(ROOT_0 (S_0 (ATS_3 (NP_1 (DT_0 a) (NN_2 dirt)) (VP_4 (VBP_0 guess) (SBAR_0 (S_1 (NP_1 (PRP_0 she)) (VP_5 (ATVP_1 (VBP_0 refer) (RB_1 back)) (VP_1 (ATVP_2 (ATVP_4 (TICK_0 ``) (VBG_0 doing)) (ADVP_0 (RB_0 really))) (PP_1 (IN_1 of) (NP_0 (PRP_0 He))))))))) (DOT_0 .)))