 Greece insisted Friday that the debate on the possible return of the Parthenon Marbles from Britain was not closed despite London appearing to rule it out.The debate on the question is not closed ... there is communication, Greek Culture Minister Lina Mendoni told private broadcaster Skai.The negotiation is very difficult but not impossible.The issue has soured Anglo-Greek relations since Thomas Bruce, the earl of Elgin and British ambassador to the Ottoman Empire, took the ancient sculptu... 