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.
One example: Passage: I submitted the hit. The hit was approved, and then I was paid.
Solution is here: What happened after I submitted the hit?
Explanation: This is a valid temporal question based on the given paragraph. Events approved and paid have a temporal relation "after" with the event submitted.

Now, solve this: Passage: Brazil and Russia agreed Thursday to develop cooperation in military, trade, space and energy affairs during a visit by Russia's Foreign Minister Sergei Lavrov, officials said. Reporters peppered Lavrov and his Brazilian counterpart, Celso Amorim, with questions about a proposed purchase of Russian-made military helicopters at a joint news conference.
Solution:
What event has already finished?