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(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (INTJ_0 (UH_0 Oh)) (COMMA_0 ,)) (NP_0 (DT_1 this))) (VP_3 (ATVP_1 (VP_5 (VBD_1 watched) (SBAR_0 (WHADVP_0 (WRB_0 how)) (S_1 (NP_0 (PRP_1 he)) (VP_5 (ATVP_3 (VBD_2 had) (PRT_0 (RP_0 up))) (S_2 (TO_0 to)))))) (CC_0 and)) (VP_1 (VB_0 leave)))) (DOT_0 .)))