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.

[EX Q]: Context: Two months later his youngest brother John, a squadron commander in the Royal Naval Air Service and a Distinguished Service Cross recipient Link Information: A number of honorary awards were made to members of allied foreign forces, including 151 for World War I Answer: 151 
[EX A]: How many people received the Cross in World War 1?

[EX Q]: Context: starts off with a French accordion and then experiments with dance-oriented beats with subtle urban influences, using synthesizers. Link Information: The accordion's basic form is believed to have been invented in Berlin, in 1822,  Answer: 1822
[EX A]: Of the instruments used in Intuition, what year was the oldest invented?

[EX Q]: Context: From Fort Ross, the northern segment continues overland, forming in part a linear valley through which the Gualala River flows. Link Information: The Gualala River is a river on the northern coast of California. Most of the river is in Sonoma County, but a portion is in Mendocino County. The headwaters of the 40 mi river ( Answer: 40
[EX A]:
How long is the Gualala River?