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.

Passage: A former agent of the US Federal Bureau of Investigation said security forces tipped off the hostages about the imminent raid by speaking to a captive who was retired officer via a concealed two-way radio. "We will free you in three minutes," was the message sent to the hostage, Bob Taubert told CNN television.
What event has already finished?