John I, Duke of Brittany
E278577
John I, Duke of Brittany was a 13th-century Breton nobleman who ruled the Duchy of Brittany and played a significant role in the politics of medieval France.
All labels observed (2)
| Label | Occurrences |
|---|---|
| John I, Duke of Brittany canonical | 16 |
| John I of Brittany | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2457915 — 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: John I, Duke of Brittany Context triple: [Duke of Brittany, officeHolder, John I, Duke of Brittany]
-
A.
Geoffrey II, Duke of Brittany
Geoffrey II, Duke of Brittany was a 12th-century French nobleman, son of Henry II of England and brother of Richard the Lionheart, who ruled Brittany through his marriage to Constance and died young in a tournament accident.
-
B.
Duke of Brittany
The Duke of Brittany was the sovereign or semi-sovereign ruler of the historic region of Brittany in northwestern France, holding a ducal title central to the area's medieval political and cultural identity.
-
C.
Conan IV, Duke of Brittany
Conan IV, Duke of Brittany was a 12th-century Breton nobleman who ruled the Duchy of Brittany and became a key figure in the complex dynastic struggles between the Angevin kings of England and the French crown.
-
D.
Prince Arthur, Duke of Brittany
Prince Arthur, Duke of Brittany was the nephew of King John of England and a Plantagenet prince whose disputed claim to the English throne and mysterious early death made him a notable figure in medieval English history.
-
E.
Henri, Duke of Anjou
Henri, Duke of Anjou was a French royal prince who later became King Henry III of France and was a prominent military and political leader during the French Wars of Religion.
- 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: John I, Duke of Brittany Target entity description: John I, Duke of Brittany was a 13th-century Breton nobleman who ruled the Duchy of Brittany and played a significant role in the politics of medieval France.
-
A.
Geoffrey II, Duke of Brittany
Geoffrey II, Duke of Brittany was a 12th-century French nobleman, son of Henry II of England and brother of Richard the Lionheart, who ruled Brittany through his marriage to Constance and died young in a tournament accident.
-
B.
Duke of Brittany
The Duke of Brittany was the sovereign or semi-sovereign ruler of the historic region of Brittany in northwestern France, holding a ducal title central to the area's medieval political and cultural identity.
-
C.
Conan IV, Duke of Brittany
Conan IV, Duke of Brittany was a 12th-century Breton nobleman who ruled the Duchy of Brittany and became a key figure in the complex dynastic struggles between the Angevin kings of England and the French crown.
-
D.
Prince Arthur, Duke of Brittany
Prince Arthur, Duke of Brittany was the nephew of King John of England and a Plantagenet prince whose disputed claim to the English throne and mysterious early death made him a notable figure in medieval English history.
-
E.
Henri, Duke of Anjou
Henri, Duke of Anjou was a French royal prince who later became King Henry III of France and was a prominent military and political leader during the French Wars of Religion.
- F. None of above. chosen
Statements (45)
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: John I, Duke of Brittany Description of subject: John I, Duke of Brittany was a 13th-century Breton nobleman who ruled the Duchy of Brittany and played a significant role in the politics of medieval France.
Referenced by (17)
Full triples — surface form annotated when it differs from this entity's canonical label.