It could so come a schoolhouse yawn outside the mounds .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 It)) (VP_4 (ATVP_1 (MD_0 could) (ADVP_0 (RB_0 so))) (VP_5 (VB_0 come) (NP_3 (NP_6 (ATNP_1 (DT_0 a) (JJ_1 schoolhouse)) (NN_1 yawn)) (PP_0 (IN_1 outside) (NP_6 (DT_0 the) (NNS_1 mounds))))))) (DOT_0 .)))