They were in gravel , he dropped up mumbled to march Bolivians , sitting lacy .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_0 (S_1 (NP_1 (PRP_0 They)) (VP_5 (VBD_1 were) (PP_1 (IN_1 in) (NP_2 (NN_3 gravel))))) (COMMA_0 ,)) (NP_0 (PRP_1 he))) (VP_3 (ATVP_3 (VBD_2 dropped) (PRT_0 (RP_0 up))) (S_2 (VP_0 (ATVP_0 (VP_5 (VBD_2 mumbled) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 march) (NP_3 (NNP_1 Bolivians)))))) (COMMA_0 ,)) (VP_2 (VBG_0 sitting) (ADVP_0 (RB_0 lacy))))))) (DOT_0 .)))