In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to write a question that clarifies the given question in such a way that the generated question has one unique answer.

Input: Consider Input: When did the ussr agree to a unified germany inside of nato?

Output: When did Gorbachev express agreement with a unified Germany inside of NATO?


Input: Consider Input: Who played marilla on anne of green gables?

Output: Who played marilla on the 1919 film anne of green gables?


Input: Consider Input: How many layers are there in osi model?


Output: How many layers are there generally considered to be in the OSI model?