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.
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Question: Sentence: They first traveled by plane around Europe, where they saw many different people and sights.

Answer: What time did they normally board the flights?


Question: Sentence: These specific animals might be more likely to visit only flowers of the same species.

Answer: What time of day do they collect pollen?


Question: Sentence: The origin of the funds remains unknown, although we have a general idea of how al Qaeda financed itself during the period leading up to 9/11.

Answer:
When did they gain a general idea of how al Qaeda  was financing itself?


