Part 1. Definition
In this task, based on the given input, we ask you to write a question about when an event happened. Your question should be answerable with common knowledge on when events usually take place. For example, "going to school" usually happens during the day (not at 2 A.M). Don't create questions which have explicit mentions of answers in the text. Instead, it has to be implied from what is given. In other words, we want you to use "instinct" or "common sense". The written questions are not required to have a single correct answer.
Part 2. Example
Sentence: Jack played basketball after school, after which he was very tired.
Answer: When did Jack play basketball?
Explanation: This event likely happened between 3PM to 8PM (definitely not 2AM). Therefore, this question is correct.
Part 3. Exercise
Sentence: After the second World Trade Center crash, Boston Center managers recognized that both aircraft were transcontinental 767 jetliners that had departed Logan Airport.
Answer:
What time did the planes crash into the World Trade Center?