it should were back a schoolhouse one lesson .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_1 it)) (VP_4 (MD_0 should) (VP_1 (ATVP_0 (ATVP_0 (VBD_0 were) (RB_1 back)) (NP_5 (DT_0 a) (NN_2 schoolhouse))) (NP_3 (CD_0 one) (NN_2 lesson))))) (DOT_0 .)))