I tried up to used gravel towards the native , burgundy classes .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 I)) (VP_4 (ATVP_3 (VBD_2 tried) (PRT_0 (RP_0 up))) (S_2 (VP_0 (TO_0 to) (VP_1 (VBN_0 used) (ADJP_0 (JJ_1 gravel) (PP_1 (IN_1 towards) (NP_2 (ATNP_0 (NP_0 (DT_0 the) (NN_2 native)) (COMMA_0 ,)) (NP_4 (JJ_1 burgundy) (NNS_1 classes)))))))))) (DOT_0 .)))