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(ROOT_0 (S_0 (ATS_3 (NP_1 (ATNP_0 (JJ_0 Several) (JJ_1 red)) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 keep) (S_2 (VP_0 (TO_0 to) (VP_1 (ATVP_3 (ATVP_2 (ATVP_0 (VB_0 be) (PRT_0 (RP_0 on))) (PP_0 (IN_1 in) (NP_5 (DT_0 the) (NN_2 morning)))) (COMMA_0 ,)) (S_2 (NP_1 (PRP_0 They)) (VP_0 (VBG_0 climbing)))))))))) (VP_4 (ATVP_3 (VBD_2 fell) (PRT_0 (RP_0 down))) (S_2 (VP_0 (TO_0 to))))) (DOT_0 .)))