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(ROOT_0 (S_0 (ATS_3 (ATS_1 (S_2 (TO_0 to)) (NP_0 (DT_1 The) (NN_2 halt))) (VP_3 (MD_0 could) (VP_1 (VBN_0 blackened) (SBAR_0 (WHNP_0 (WP_0 who)) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 have) (NP_1 (PRP_0 He))))))))) (DOT_0 .)))