his friend asked her friend , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (SBAR_0 (S_1 (NP_0 (PRPDOLLAR_0 his) (NN_0 friend)) (VP_5 (VBD_1 asked) (NP_3 (PRPDOLLAR_0 her) (NN_0 friend))))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))