she refer of the content chin of boy boy , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (SBAR_0 (S_1 (NP_0 (PRP_1 she)) (VP_5 (VBP_0 refer) (PP_2 (IN_0 of) (NP_3 (NP_6 (ATNP_1 (DT_0 the) (JJ_1 content)) (NN_1 chin)) (PP_0 (IN_1 of) (NP_2 (NN_2 boy) (NN_3 boy)))))))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))