Elena Simperl * Devika P. Madalli ** Denny Vrandecic * Enrique Alfonseca ***
* Karlsruhe Institute of Technology (KIT),
Institute of Applied Informatics and Formal Description Methods, Englerstr. 11, building 11.40, 76131 Karlsruhe
** Indian Statistical Institute,
Documentation Research & Training Centre (DRTC), Indian Statistical Institute, 8th Mile Mysore Road, RV College PO, Bangalore- 560 059, Karnataka, South India
*** Google Inc., Brandschenkestraße 110, 8002 Zurich, Switzerland