to gravel , that wore teaching on .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (PP_2 (TO_0 to) (NP_2 (NN_3 gravel))) (COMMA_0 ,)) (NP_0 (DT_1 that))) (VP_3 (VBD_1 wore) (VP_2 (VBG_0 teaching) (PRT_0 (RP_0 on))))) (DOT_0 .)))