She climbing a gravel then forced to .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 She)) (VP_4 (ATVP_1 (ATVP_4 (VBG_0 climbing) (NP_5 (DT_0 a) (NN_2 gravel))) (ADVP_0 (RB_0 then))) (VP_5 (VBD_2 forced) (S_2 (TO_0 to))))) (DOT_0 .)))