November 5, 2008
      
                  
        
  Author(s)
  Hoa T. Dang,   Jimmy  Lin,   Diane  Kelly
 
       
            
    
    
        The TREC 2006 question answering track contained two tasks: a main task and a complex, interactive question answering (ciQA) task. As in 2005, the main task consisted of series of factoid, list, and ``Other'' questions organized around a set of targets