Andreas Harth Aidan Hogan Renaud Delbru Jürgen Umbrich Seán O'Riain Stefan Decker SWSE: Answers Before Links! 2007 Semantic Web Challenge http://ceur-ws.org/Vol-295/paper18.pdf conf/semweb/2007challenge db/conf/semweb/challenge2007.html#HarthHDUOD07