In this task, we ask you to write a question that asks about "event duration", based on a given sentence. The question will likely start with "How long". Your question should be answerable based on the common knowledge of how long certain events usually last. 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". Note that the written questions are not required to have a single correct answer.

[Q]: Sentence: This aversion to war also led Einstein to befriend author Upton Sinclair and film star Charlie Chaplin, both noted for their pacifism.
[A]: How long did Einstein befriend the authors?


[Q]: Sentence: During the ensuing Battle of Chaeronea, Philip commanded the right wing and Alexander the left, accompanied by a group of Philip's trusted generals.
[A]: How long did the battle last?


[Q]: Sentence: They piloted the explosives-laden boat alongside the USS Cole, made friendly gestures to crew members, and detonated the bomb.
[A]:
How long did it take to detonate the bomb?


