Canada could join the Eurovision Song Contest if it wishes, director Martin Green told the BBC, but the country has not yet made a formal request. "Nothing's particularly come over my desk," Green said on Wednesday, adding that the door is open for a future Canadian entry. "We will welcome anyone through those doors who wants to share the values of this wonderful occasion and stand on our stage with friends," he said. Prime Minister Mark Carney, who has been forging closer political and