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: In 1526, he was imprisoned by Charles V, Holy Roman Emperor, who was angry at his role in founding the League of Cognac Link Information: Charles V (24 February 1500 – 21 September 1558) was Holy Roman Emperor and Archduke of Austria from 1519, King of Spain (Castile and Aragon, as Charles I) from 1516, and Lord of the Netherlands as titular Duke of Burgundy from 1506. Answer:  Roman 
Example Output: Which country's emperor had Gramont imprisoned due to his role in founding the League of Cognac?

Example Input: Context: In 1988 he returned to San Francisco Link Information: none Answer: none
Example Output: Was the crime rate in London higher than San Francisco the year Mitchison returned to San Francisco?

Example Input: Context: travelers could use the Green River Valley to connect east through South Pass or west toward the Snake River. Link Information: Snake River is a major river of the greater Pacific Northwest region in the United States. At 1078 mi long Answer: 1078 mi
Example Output:
How long is the river that the trail could bring travelers west toward?