she , was of kids sitting A schoolhouse unmistakably left up .
(ROOT_0 (S_0 (ATS_3 (NP_1 (ATNP_0 (NP_0 (PRP_1 she)) (COMMA_0 ,)) (S_2 (VP_0 (VBD_0 was) (PP_1 (IN_1 of) (NP_2 (NP_4 (NNS_1 kids)) (VP_2 (VBG_0 sitting) (NP_5 (DT_0 A) (NN_2 schoolhouse)))))))) (VP_4 (ATVP_0 (ADVP_0 (RB_0 unmistakably)) (VBD_2 left)) (PRT_0 (RP_0 up)))) (DOT_0 .)))