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(ROOT_0 (S_0 (ATS_3 (SBAR_0 (WHNP_0 (WP_0 who)) (S_1 (ATS_1 (ATS_2 (SBAR_0 (IN_2 across) (S_1 (NP_0 (DT_1 The)) (VP_5 (VBD_1 grimaced) (NP_1 (PRP_0 It))))) (COMMA_0 ,)) (NP_0 (PRP_1 she))) (VP_3 (ATVP_1 (VBD_0 knew) (RB_1 no)) (VP_5 (VBD_2 wore) (PP_2 (ATPP_0 (ADVP_0 (RB_1 back) (RB_1 so)) (IN_2 while)) (PP_2 (TO_0 to) (NP_2 (NN_3 privacy)))))))) (COMMA_0 ,)) (DOT_0 .)))