I've had a bit more fun with SPARQL and Wikidata.
This one was way harder than my previous fun with "find the oldest people who won a given prize" (Nobel Prize/Oscar) mastodon.social/@cirosantilli/112689376315990248 because unlike those prizes where all the decisions are centralized, countries are much more complicated beasts, with changing currencies and international recognition.
This was a good experience to see a few ways in which Wikidata is inconsistent, with the same concept being expressed in multiple different ways, e.g. "end time" property of the current vs the superior "end time" qualifier.
Particularly bad is the notion of a "deprecated rank", that should really not exist.
This is exactly the type of semi interactive data munching that I like to do, a bit in the same vein as CIA 2010 covert communication websites and Cool data embedded in the Bitcoin blockchain.
As you might imagine, the secret services use exactly this type of knowledge modelling to do their dirty business, e.g. Gaffer by the GCHQ.
If only I weren't such a rebel, I'd be a perfect fit for the intelligence agencies.

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