a regional arm watched to teach up .
(ROOT_0 (S_0 (ATS_3 (NP_1 (ATNP_1 (DT_0 a) (JJ_1 regional)) (NN_0 arm)) (VP_4 (VBD_2 watched) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 teach) (PRT_0 (RP_0 up))))))) (DOT_0 .)))