Task: Pos Tagging
Input (English): Sentence: An early September 2003 Newsweek article included a rumor by a Taliban source that at a meeting in April 2003 Bin Laden was planning an " unbelievable {{ " }} biological attack , the plans for which had suffered a setback upon the arrest of Khalid Shaikh Mohammed ( " KSM " ) . 
Word: "
Output (English): ''