Detailed Instructions: In this task, a passage will be given and the goal is to generate a question about temporal relations based on that passage. A temporal relation describes the relation between two things with respect to time e.g., something happens/starts/terminates/... immediately/shortly/usually/... before/after/during/... something else.
Your question should include an event, or ask about an event, and should not be a yes/no question.
Q: Passage: "The horror of biological weapons is shared by all," Annan told a meeting in Geneva to review the 1972 Biological Weapons Convention, which has been ratified by 155 countries. "Now it is time for countries to build on results, and take further steps to ensure that the Convention will continue to serve as an effective barrier against biological weapons," Annan told the conference, which began on Monday and will end on Dec. 8.
A:
What event has already finished?