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.

[Q]: Context: Rear Admiral Herbert James Ray (1 February 1893 – 3 December 1970) was an officer in the United States Navy who served in World War I and World War II. Link Information: none Answer: none
[A]: Which of the wars that Ray served in had the most casualties?


[Q]: Context: In 284, emperor Diocletian restored political stability. Link Information: none Answer: none
[A]: How many people lived in Milan when Diocletian restored political stability after the Crisis of the Third Century?


[Q]: Context: Trump asking Zelensky to launch investigations into Joe Biden, Hunter Biden, Link Information: Joseph Robinette Biden Jr. (; born November 20, 1942) Answer: 28
[A]:
What is the age difference between the two men who Trump asked Zelensky to launch investigations into?