Maria Soledad Pera Rani Qumsiyeh Meher T. Shaikh Yiu-Kai Ng Retrieving good, better, and best answers to questions in advertisements. 3-6 2009 WIDM https://doi.org/10.1145/1651587.1651590 conf/widm/2009 db/conf/widm/widm2009.html#PeraQSN09