You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, we ask you to write an answer to a question about when an event happened. For example, "going to school" usually happens during the day (not at 2 A.M). Note that a lot of the questions could have more than one correct answer. We only need a single most-likely answer. Please try to keep your "answer" as simple as possible. Concise and simple "answer" is preferred over those complex and verbose ones.

Sentence: Jack played basketball after school, after which he was very tired. 
Question: When did Jack play basketball?
Solution: 4 PM.
Why? This event likely happened between 3PM to 8PM. This is a good answer.

New input: Sentence: In the fall of 1991, he asked a German family he had met in Cairo to help him continue his education in Germany. 
Question: What month did he do this?
Solution:
october.