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Some possible candidates I found online:

But unfortunately nothing serious.

Ideally, it would be an organized database, which some basic relationship between these countries.

If it's only limited to a certain period in history, it'd help too.

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    I think the hierarchy of categories on Wikipedia is probably the best dataset for such a general question, but you'll need to find a recursive means of querying it to see contents of subcategories. – Aaron Brick Aug 24 '18 at 16:22
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    Such an effort would seem, as a British football announcer would put it "a bit ambitious". – T.E.D. Aug 24 '18 at 17:40

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