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(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_0 (ATS_0 (S_1 (NP_0 (PRP_1 they)) (VP_5 (MD_0 would) (VP_1 (ATVP_0 (VBG_0 climbing) (PRT_0 (RP_0 about))) (NP_3 (NNS_1 mounds))))) (COMMA_0 ,)) (COMMA_0 ,)) (NP_0 (DT_1 The) (NN_2 friend))) (VP_3 (VBZ_0 is) (PP_1 (IN_1 across) (NP_0 (DT_1 that))))) (DOT_0 .)))