it happened back , of the morning mutter the terrible Quechua school , as class .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_1 it)) (VP_4 (ATVP_3 (ATVP_2 (ATVP_0 (VP_5 (VBD_0 happened) (PRT_0 (RP_0 back))) (COMMA_0 ,)) (PP_0 (IN_1 of) (NP_2 (NP_4 (DT_0 the) (NN_2 morning)) (VP_2 (VBP_0 mutter) (NP_6 (ATNP_1 (ATNP_1 (DT_0 the) (JJ_1 terrible)) (NNP_1 Quechua)) (NN_1 school)))))) (COMMA_0 ,)) (PP_1 (IN_1 as) (NP_2 (NN_3 class))))) (DOT_0 .)))