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 summoning of politicians came after prosecutors pledged a new probe into politicians whose names have surfaced in the course investigations into the massive loans-for-kickbacks scandal engulfing Hanbo. The prosecution had said that aside from the arrested four, they had no plans to investigate other politicians who allegedly took customary "rice cake expenditures."
A:
What event has already finished?