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.

Example Input: Sentence: He turned, and across the court-room the eyes of the financier and the stenographer met.
Example Output: How long did they look at each other?

Example Input: Sentence: So from now on, Marsha takes extra special care to make sure Joey is safe and sound at all times.
Example Output: How long had Joey been safe and sound?

Example Input: Sentence: They are able to study the DNA of the organism that no longer lives on Earth.
Example Output:
How long did it take to study the DNA?

