Disambiguation evidence for Byzantine Emperor Basil I via surface form

"Basil I (as rising figure at court)"

Triples (1)

Triples where some other subject referred to this entity as "Basil I (as rising figure at court)".

Battle of Lalakaon (863) → underRuler →
"Basil I (as rising figure at court)"
↳ resolves to Byzantine Emperor Basil I
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