All alpaca should teach down I were .
(ROOT_0 (S_0 (ATS_3 (NP_1 (DT_1 All) (NN_2 alpaca)) (VP_4 (MD_0 should) (VP_1 (ATVP_0 (VB_0 teach) (PRT_0 (RP_0 down))) (SBAR_0 (S_1 (NP_1 (PRP_0 I)) (VP_5 (VBD_0 were))))))) (DOT_0 .)))