I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "Bern was a candidate to host the 2010 Winter Olympics, but withdrew its bid in September 2002 after a referendum was passed that showed that the bid was not supported by locals. Those games were eventually awarded to Vancouver, Canada."? 

Vancouver could not have hosted the 2010 Olympics without who backing out?