Task: Question Answering
Input (English): Here's a brilliant piece from Roger Cohen , penned right before last week's 9/11 anniversary : Wednesday , September 10 , 2008 NEW YORK : And in the seventh year after the fall , the dust and debris of the towers cleared . And it became plain at last what had been wrought . For the wreckage begat greed ; and it came to pass that while America's young men and women fought , other Americans enriched themselves . 
Question: Why was there a 9/11 anniversary ?
Output (English): Because 9/11 was a very significant event in history .