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.

What is the si unit for magnetic field strength?
What is the si unit symbol for magnetic field strength?

When did a/c first appear in homes?
When did the first a/c unit appear in a home?

When were the common core state standards developed?

When did the development of common core standards begin?