I asked when she dropped to .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_1 I)) (VP_4 (VBD_0 asked) (SBAR_0 (WHADVP_0 (WRB_0 when)) (S_1 (NP_0 (PRP_1 she)) (VP_5 (VBD_2 dropped) (S_2 (VP_0 (TO_0 to)))))))) (DOT_0 .)))