She finally grimaced down with the back lesson .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (NP_1 (PRP_0 She)) (ADVP_0 (RB_0 finally))) (VP_3 (ATVP_3 (VBD_2 grimaced) (PRT_0 (RP_0 down))) (PP_2 (IN_0 with) (NP_6 (ATNP_1 (DT_0 the) (JJ_1 back)) (NN_1 lesson))))) (DOT_0 .)))