%A Krisztian Balog
%A Jiyin He
%A Katja Hofmann
%A Valentin Jijkoun	and Christof Monz
%A Manos Tsagkias
%A Wouter Weerkamp
%A Maarten de Rijke
%T The University of Amsterdam at WePS2
%C Madrid, Spain
%D 2009
%L www2009258