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(ROOT_0 (S_0 (ATS_3 (ATS_1 (TICK_0 ``) (NP_1 (PRP_1 they))) (VP_3 (VBD_1 was) (VP_2 (VBG_0 doing) (PP_2 (IN_0 In) (NP_3 (NP_6 (ATNP_1 (DT_0 a) (JJ_1 black)) (NN_1 light)) (PP_0 (IN_1 in) (NP_5 (NN_3 someone)))))))) (DOT_0 .)))