Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Passage: Three centres have been set up in the city to receive foreign investors' complaints, Lu said. 
Student:
What event has already finished?