The group was listened classes in <apostrophe><apostrophe> .
(ROOT_0 (S_0 (ATS_3 (NP_1 (DT_1 The) (NN_2 group)) (VP_4 (VBD_1 was) (VP_2 (VBN_0 listened) (PP_2 (ATPP_0 (NP_4 (NNS_1 classes)) (IN_1 in)) (APOSTROPHE_0 <apostrophe><apostrophe>))))) (DOT_0 .)))