...has passed: April 5, 2010
...has passed: May 6, 2010
May 24, 2010 (11:59pm EST)
June 6, 2010
Xin Luna Dong, AT&T Labs-Research, USA lunadong@research.att.com
Felix Naumann, Hasso Plattner Institute, Germany naumann@hpi.uni-potsdam.de