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.
Input: Passage: Fei Junlong, 40, and Nie Haisheng, 41, went into space on Oct. 12 from the Jiuquan Satellite Launch Center and returned to Earth on Oct. 17. They conducted a series of unprecedented experiments on the spacecraft.
Output:
What event has already finished?