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I have an EntityProperty and I know how to get its list of qualifiers. Now how do I figure out the possible values these can take programmatically? Here's an example to get us started:
EntityValue[
EntityProperty["Country", "ExternalBalance"],
"Qualifiers"
]
{"CurrencyUnit", "Date", "PercentOfGDP", "TradeSection"
Now, say, how do I programmatically determine what "CurrencyUnit", "TradeSection", and "PercentOfGDP" can be?

EntityValue[ EntityProperty["Country", "ExternalBalance"], "QualifierValues"]? – M.R. Nov 18 '18 at 22:21EntityValuedocumentation. – Edmund Nov 18 '18 at 23:55