TASK DEFINITION: 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.
PROBLEM: When did great britain change its name to united kingdom?

SOLUTION: When did great britain change its name to United Kingdom of Great Britain & Ireland?

PROBLEM: Who became president of the republic of china after the overthrow of the qing dynasty?

SOLUTION: Who was the first formal president of the Republic of China after the overthrow of the Qing Dynasty?

PROBLEM: Why would a recrystallization need to be done?

SOLUTION:
Why would recrystallization need to be done in chemistry?