In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Q: Context: Many prefabricated concrete structures, common in the former Warsaw Pact countries, were modernized Link Information: none Question: What countries were part of the pact that saw prefabricated concrete structures modernized?

A: Answer: none
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Q: Context: During the American Revolutionary War, he served in several battles, including the Battle of Brandywine, and endured the winter at Valley Forge. Link Information: none Question: In what states did John Marshall serve in the American Revolution?

A: Answer: none
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Q: Context: John Milne Jnr., whose aeroplane went missing whilst flying over the Irish sea in 1937. Link Information: John Milne Jnr., whose aeroplane went missing whilst flying over the Irish sea in 1937. Question: How old was Thomas Andrews the year that John Milne's aeroplane went missing?

A:
Answer: 64
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