In the 1980s, a group of students from the Royal Academy of Fine Arts in Antwerp, Belgium attracted international attention for their innovative, agenda-setting fashion: Walter Van Beirendonck, Ann Demeulemeester, Dries Van Noten, Dirk Van Saene, Dirk Bikkembergs and Marina Yee. Now, as Van Beirendonck retires from his post as head of the Academy’s fashion department, five of the “Antwerp Six” gave straight answers to questions from…