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(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (VBP_0 <apostrophe>m) (SBAR_0 (WHNP_0 (WP_0 who)) (S_2 (NP_1 (PRP_0 You)) (VP_0 (ATVP_4 (VBD_0 captivated) (RB_1 else)) (SBAR_0 (IN_2 that) (S_1 (NP_1 (PRP_0 They)) (VP_5 (ATVP_4 (VBG_0 climbing) (NP_5 (DT_0 the) (NN_2 lesson))) (PP_2 (IN_0 on) (NP_3 (NNS_1 eggs))))))))))) (DOT_0 .)))