never , we come up , to teach structures .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (ADVP_0 (RB_0 never)) (COMMA_0 ,)) (NP_0 (PRP_1 we))) (VP_3 (ATVP_3 (ATVP_2 (VB_0 come) (PRT_0 (RP_0 up))) (COMMA_0 ,)) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 teach) (NP_3 (NNS_1 structures))))))) (DOT_0 .)))