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(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (VBN_0 why) (S_2 (VP_0 (TO_0 to) (VP_1 (ATVP_0 (VBD_2 came) (ADVP_0 (RB_0 forward))) (SBAR_0 (WHNP_0 (WDT_0 that)) (S_2 (VP_0 (VBG_0 going))))))))) (DOT_0 .)))