Ivan Alexander of Bulgaria
E1020338
Ivan Alexander of Bulgaria was a 14th-century tsar who presided over a cultural and religious revival in the Second Bulgarian Empire while struggling against internal fragmentation and external threats.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Ivan Alexander of Bulgaria canonical | 9 |
| Ivan Alexander | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T12415477 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Ivan Alexander of Bulgaria Context triple: [Shishman dynasty, hasMember, Ivan Alexander of Bulgaria]
-
A.
Ivan Stephen of Bulgaria
Ivan Stephen of Bulgaria was a 14th-century tsar of Bulgaria from the Shishman dynasty whose brief reign reflected the political instability of the medieval Bulgarian state.
-
B.
Ivan Vladislav of Bulgaria
Ivan Vladislav of Bulgaria was the last Tsar of the First Bulgarian Empire, known for his fierce resistance against Byzantine expansion before the empire’s eventual fall in 1018.
-
C.
Michael of Bulgaria
Michael of Bulgaria was a medieval Bulgarian prince, known primarily as a son of Tsar Simeon I during the First Bulgarian Empire.
-
D.
Peter IV of Bulgaria
Peter IV of Bulgaria was a medieval Bulgarian tsar who played a key role in the restoration of Bulgarian independence and the establishment of the Second Bulgarian Empire in the late 12th century.
-
E.
Prince Kyril of Bulgaria
Prince Kyril of Bulgaria is a Spanish-born financier and environmental advocate, best known as the second son of Bulgaria’s last tsar, Simeon II, and a prominent member of the former Bulgarian royal family.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Ivan Alexander of Bulgaria Target entity description: Ivan Alexander of Bulgaria was a 14th-century tsar who presided over a cultural and religious revival in the Second Bulgarian Empire while struggling against internal fragmentation and external threats.
-
A.
Ivan Stephen of Bulgaria
Ivan Stephen of Bulgaria was a 14th-century tsar of Bulgaria from the Shishman dynasty whose brief reign reflected the political instability of the medieval Bulgarian state.
-
B.
Ivan Vladislav of Bulgaria
Ivan Vladislav of Bulgaria was the last Tsar of the First Bulgarian Empire, known for his fierce resistance against Byzantine expansion before the empire’s eventual fall in 1018.
-
C.
Michael of Bulgaria
Michael of Bulgaria was a medieval Bulgarian prince, known primarily as a son of Tsar Simeon I during the First Bulgarian Empire.
-
D.
Peter IV of Bulgaria
Peter IV of Bulgaria was a medieval Bulgarian tsar who played a key role in the restoration of Bulgarian independence and the establishment of the Second Bulgarian Empire in the late 12th century.
-
E.
Prince Kyril of Bulgaria
Prince Kyril of Bulgaria is a Spanish-born financier and environmental advocate, best known as the second son of Bulgaria’s last tsar, Simeon II, and a prominent member of the former Bulgarian royal family.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Eastern Orthodox Christian
ⓘ
medieval ruler ⓘ person ⓘ tsar of Bulgaria ⓘ |
| associatedWork | Tetraevangelia of Ivan Alexander ⓘ |
| birthPlace |
Bulgarian Empire
ⓘ
Lovech ⓘ |
| capitalDuringReign |
Tărnovo
ⓘ
linked to:
Tarnovo
|
| child |
Ivan Asen IV of Bulgaria
ⓘ
Ivan Shishman of Bulgaria ⓘ
linked to:
Ivan Shishman
Ivan Sratsimir of Bulgaria ⓘ Keratsa of Bulgaria ⓘ Michael Asen IV of Bulgaria ⓘ |
| combated |
Bogomil heresy
ⓘ
linked to:
Catharism
other religious heresies ⓘ |
| country | Second Bulgarian Empire ⓘ |
| deathDate | 1371 ⓘ |
| deathPlace |
Second Bulgarian Empire
ⓘ
Tărnovo ⓘ
linked to:
Tarnovo
|
| dynasty | Sratsimir dynasty ⓘ |
| era | 14th century ⓘ |
| faced |
external military threats
ⓘ
internal fragmentation of his realm ⓘ |
| father | Sratsimir of Kran ⓘ |
| house | Sratsimir dynasty ⓘ |
| issued | law codes strengthening Orthodox faith ⓘ |
| languageOfCourt | Middle Bulgarian ⓘ |
| mother | Keratsa Petritsa ⓘ |
| notableFor |
conflicts with the Ottoman Turks
ⓘ
conflicts with the Serbian Kingdom ⓘ cultural revival in medieval Bulgaria ⓘ division of Bulgarian lands among his sons ⓘ religious revival in the Second Bulgarian Empire ⓘ struggle against Byzantine Empire ⓘ |
| patronOf |
Orthodox monasteries
ⓘ
church building ⓘ literature ⓘ |
| positionHeld | Tsar of Bulgaria ⓘ |
| predecessor | Ivan Stephen of Bulgaria ⓘ |
| promoted | translation of religious texts into Bulgarian ⓘ |
| realm | Second Bulgarian Empire ⓘ |
| reignEnd | 1371 ⓘ |
| reignStart | 1331 ⓘ |
| religion |
Eastern Orthodoxy
ⓘ
linked to:
Eastern Orthodox Christianity
|
| spouse |
Sarah-Theodora
ⓘ
Theodora of Wallachia ⓘ |
| successor |
Ivan Shishman of Bulgaria
ⓘ
linked to:
Ivan Shishman
Ivan Sratsimir of Bulgaria ⓘ |
| supported |
Tărnovo Literary School
ⓘ
linked to:
Tarnovo Literary School
|
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Ivan Alexander of Bulgaria Description of subject: Ivan Alexander of Bulgaria was a 14th-century tsar who presided over a cultural and religious revival in the Second Bulgarian Empire while struggling against internal fragmentation and external threats.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Ivan Alexander of Bulgaria