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: Demonstrations against US President George W. Bush turned violent in the southern Argentine city of Mar Del Plata on Friday when protesters threw rocks at the police and smashed windows of buildings. The demonstrators, chanting slogans such as "Bush, gets out of Argentina," "Bush is a fascist," set fire on a shop and burned a US flag.
A:
What event has already finished?