herself refer piled sitting under the back friend , over .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 herself)) (VP_4 (ATVP_3 (ATVP_2 (VBP_0 refer) (S_2 (VP_0 (VBD_2 piled) (VP_2 (VBG_0 sitting) (PP_2 (IN_0 under) (NP_6 (ATNP_1 (DT_0 the) (JJ_1 back)) (NN_1 friend))))))) (COMMA_0 ,)) (PP_1 (IN_1 over)))) (DOT_0 .)))