In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.

Example Input: Context: Daxing was renamed Chang'an in year 618 when the Duke of Tang, Li Yuan, proclaimed himself the Emperor Gaozu of Tang. Link Information: born Li Yuan, courtesy name Shude, was the founder of the Tang dynasty of China, and the first emperor of this dynasty from 618 to 626. Answer: 8
Example Output: How many years did Duke of Tang serve as emperor after renaming Daxing, Chang'an?

Example Input: Context: She then taught at Southern Illinois University in 1926–28 Link Information: Agnes Larson (15 March 1892 – 24 January 1957) Answer: 34
Example Output: How old was Larson's sister Agnes the year Larson began teaching at Southern Illinois University?

Example Input: Context: Born in LaRue, Ohio, Link Information: none Answer: none
Example Output:
What is the area code of the town where Milligan was born?