Disambiguation evidence for Imperial German war ensign via surface form

"Flag of the German Empire (black-white-red tricolour)"

Triples (1)

Triples where some other subject referred to this entity as "Flag of the German Empire (black-white-red tricolour)".

Second Reich → flag →
"Flag of the German Empire (black-white-red tricolour)"
↳ resolves to Imperial German war ensign
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