@inproceedings{Bos2006TREC,
   title     = {The "La Sapienza" Question Answering system at TREC-2006},
   author    = {Bos, Johan},
   booktitle = {The Fifteenth Text RETrieval Conference (TREC 2006)},
   editor    = {Voorhees, E. M. and Buckland, L. P.},
   address   = {Gaitersburg, MD},
   pages     = {797--803},
   year      = {2006}
}