Edited sentence: A group of some 250-plus international academics, for the main part historians and Classicists teaching at the most renowned universities in the world - including the likes of Oxford, Cambridge, Princeton, Stanford, Vassar, College de France and hundreds of others in the United States and Europe - have sent a letter to U.President Barack Obama asking him to intervene to "clean up the historical debris" left by the previous U.administration's policy on the Former Yugoslav Republic of Macedonia