You will be given a definition of a task first, then some input of the task.
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.

Sentence: The major organs of the digestive system include the mouth, esophagus, stomach, and small and large in- testines.
Output:
How long does it take for food to be digested?