TRANSPLANT MAN DIES Dusan vlaco,from Yugoslavia,the second-longest surviving heart transplant patient, has died in LA. He received the new heart on Seotember 18 the 1698
正しい文は以下のようになると思います。 TRANSPLANT MAN DIES Dusan Vlaco from Yugoslavia, the second-longest surviving heart transplant patient, has died in LA. He received the new heart on September 18, 1968. 質問者様の打ち間違いでなければ、「年の前の the が不要」が間違いの箇所でしょう。