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.

Context: Pyotr Filippovich Berestov (; , Berestovo – November 26, 1961, Zaporozhye) Link Information: none Answer: none
What age was Berestov the year the Winter War began?

Context: On 15 June Sinn Féin's Gerry Adams met with Theresa May, telling her that he thought she was in breach of the Good Friday Agreement. Link Information: The agreement is made up of two inter-related documents, both agreed in Belfast on Good Friday, 10 April 1998: Answer: 10 April 1998
When was the Good Friday Agreement established?

Context: He posted six interceptions in his Michigan career, including one for a touchdown. Another one during the same season was a game saving interception in the 1986 Fiesta Bowl in a 27–23 victory over the Nebraska Cornhuskers football team. Link Information: Nebraska claims 46 conference championships and five national championships Answer: five 

How many national championships does the team that Garland Rivers defeated in the 1986 Fiesta Bowl have?