Given the task definition and input, reply with output. 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: But an investigation published by Time magazine in March contradicted the official version of events. Colonel Stewart Navarre told a press conference Thursday that the Marines' initial release was false.

What event has already finished?