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: and rose to international prominence serving as a chief member of the 1876 Philadelphia Exposition, Link Information: The Centennial Commission turned to third-place winner's architect Henry Pettit and engineer Joseph M. Wilson for design and construction of the Main Exhibition Building. A temporary structure, the Main Building was the largest building in the world by area, enclosing 21.5 acre. Question: What building was the 1876 Philadelphia Exposition held at?

A: Answer: the Main Exhibition Building
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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: Posted to Western Australia to take command of RAAF Station Pearce in August Link Information: none Question: How many groups were stationed at RAAF Station Pearce in August 1940 when Charlesworth was in command?

A:
Answer: none
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