Definition: 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.

Positive Example 1 -
Input: Passage: I submitted the hit. The hit was approved, and then I was paid.
Output: What happened after I submitted the hit?

Positive Example 2 -
Input: Passage: Heavy snow is causing disruption to transport across the UK, with heavy rainfall bringing flooding to the south-west of England. Rescuers searching for a woman trapped in a landslide at her home in Looe, Cornwall, said they had found a body.
Output: What event has started?

Negative Example 1 -
Input: Passage: He will be happy after he attends the party.
Output: Is he happy now?

Negative Example 2 -
Input: Passage: I submitted the hit. The hit was not approved, and then I was not paid.
Output: What did I submit?

Now complete the following example -
Input: Passage: Meanwhile, precipitation in the central part of northwest China, the southwestern part of the Qinghai-Tibet plateau and most stretches of central and north China tended to decrease obviously. Zuo Hongchao, who took part in the precipitation investigation, said the research was of great importance, as changes in precipitation would impact water resources, agricultural production and the ecological system in China.
Output: 



Output:
What event has already finished?
What event has begun but has not finished?
What will happen in the future?
What event started before something tended?
What happened when something tended?
What may happen after the investigation?
What event started before the the investigation?