Disambiguation evidence for Ivan IV the Terrible via surface form

"Ivan IV Vasilyevich, Tsar of Russia"

Triples (1)

Triples where some other subject referred to this entity as "Ivan IV Vasilyevich, Tsar of Russia".

Ivan the Terrible in Rimsky-Korsakov's "The Maid of Pskov" → basedOn →
"Ivan IV Vasilyevich, Tsar of Russia"
↳ resolves to Ivan IV the Terrible
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