what to listened They , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (SBAR_0 (WHNP_0 (WP_0 what)) (S_2 (VP_0 (TO_0 to) (VP_1 (VBN_0 listened) (NP_1 (PRP_0 They)))))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))