You can add a new person with the name "Međunarodni znanstveno-stručni skup Bosanski ban Tvrtko "pod Prozorom u Rami",", or you can "Međunarodni znanstveno-stručni skup Bosanski ban Tvrtko "pod Prozorom u Rami"," with a person entry that is so far only been referred to by another name (such as a former name or an alias name).