back a tree had worried down the group in a good light .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (RB_1 back) (NP_5 (DT_0 a) (NN_2 tree))) (VP_3 (VBD_1 had) (VP_2 (VBN_0 worried) (PP_2 (IN_0 down) (NP_3 (NP_5 (DT_0 the) (NN_2 group)) (PP_0 (IN_1 in) (NP_6 (ATNP_1 (DT_0 a) (JJ_1 good)) (NN_1 light)))))))) (DOT_0 .)))