Definition: In this task, you are given a news article. Your task is to classify the article to one out of the four topics 'World', 'Sports', 'Business', 'Sci/Tech' if the article's main topic is relevant to the world, sports, business, and science/technology, correspondingly. If you are not sure about the topic, choose the closest option. Note that URLs in the text have been replaced with [Link].
Input: Ex-Adviser Sees Rare Opportunity On Mideast Front    R   obert Malley , a former assistant to President    Bill Clinton  who rejects blaming only    Yasser Arafat  for the collapse of peace efforts four years ago, warns that a rare window of opportunity for engaging both sides "is not going to be eternally open."

World