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.

Input: Consider Input: Sentence: Columbia University's student group for ROTC cadets and Marine officer candidates is named the Alexander Hamilton Society.

Output: How many years are students usually in the Alexander Hamilton Society?


Input: Consider Input: Sentence: Later in the month, they traveled to China by train and were allowed to see how different life was over there.

Output: How long did they stay in China?


Input: Consider Input: Sentence: He also promises to `` come to '' him .


Output: How long does it take for him to "come to" him?


