Ptolemaida
E108613
Ptolemaida is a city in northern Greece known for its significant lignite mines and power plants, making it an important center of the country’s energy production.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Ptolemaida canonical | 22 |
| Ptolemaida city | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T799613 — 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: Ptolemaida Context triple: [Macedonia (Greece), containsCity, Ptolemaida]
-
A.
Cyrene
Cyrene is an ancient Greek and Roman city in eastern Libya renowned for its well-preserved ruins and historical significance as a major center of classical civilization.
-
B.
Lampsacus
Lampsacus was an ancient Greek city on the eastern shore of the Hellespont, known as a center of philosophy and culture in classical antiquity.
-
C.
Pella
Pella is a well-known American brand specializing in the design and manufacture of windows and doors for residential and commercial buildings.
-
D.
Demetrias
Demetrias was an ancient Greek city in the region of Thessaly, known as a significant Hellenistic and later Roman urban and naval center.
-
E.
Pherae
Pherae was an ancient Greek city in Thessaly known for its political influence and as the seat of the powerful tyrant Jason of Pherae.
- 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: Ptolemaida Target entity description: Ptolemaida is a city in northern Greece known for its significant lignite mines and power plants, making it an important center of the country’s energy production.
-
A.
Cyrene
Cyrene is an ancient Greek and Roman city in eastern Libya renowned for its well-preserved ruins and historical significance as a major center of classical civilization.
-
B.
Lampsacus
Lampsacus was an ancient Greek city on the eastern shore of the Hellespont, known as a center of philosophy and culture in classical antiquity.
-
C.
Pella
Pella is a well-known American brand specializing in the design and manufacture of windows and doors for residential and commercial buildings.
-
D.
Demetrias
Demetrias was an ancient Greek city in the region of Thessaly, known as a significant Hellenistic and later Roman urban and naval center.
-
E.
Pherae
Pherae was an ancient Greek city in Thessaly known for its political influence and as the seat of the powerful tyrant Jason of Pherae.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | city ⓘ |
| administrativeRegion |
Region of Western Macedonia
ⓘ
linked to:
Western Macedonia
|
| areaCode | +30 24630 ⓘ |
| climate | continental-influenced Mediterranean climate ⓘ |
| country | Greece ⓘ |
| countryCode | GR ⓘ |
| countrySubdivision | Periphery of Western Macedonia ⓘ |
| demographics | population in the tens of thousands ⓘ |
| economicActivity |
electric power generation
ⓘ
lignite extraction ⓘ |
| elevation | approximately 600 meters above sea level ⓘ |
| energySource | lignite ⓘ |
| environmentalIssue |
air pollution from lignite power plants
ⓘ
land degradation from open-pit mining ⓘ |
| formerMunicipality | Ptolemaida municipality ⓘ |
| hasEducationalInstitution | vocational and technical schools related to energy sector ⓘ |
| hasHospital | General Hospital of Ptolemaida ⓘ |
| hasIndustry |
energy industry
ⓘ
mining industry ⓘ |
| hasMuseum | Folklore Museum of Ptolemaida ⓘ |
| hasPowerPlant |
Ptolemaida Power Station
ⓘ
Ptolemaida V Power Plant ⓘ
linked to:
Ptolemaida Power Station
|
| hasResource | lignite deposits ⓘ |
| hasSportsTeam | local football clubs ⓘ |
| historicalRegion |
Macedonia
ⓘ
linked to:
Macedonia (Greece)
|
| knownFor |
coal-fired power plants
ⓘ
electricity production ⓘ lignite mines ⓘ |
| language | Greek ⓘ |
| locatedIn |
Western Macedonia
ⓘ
northern Greece ⓘ
linked to:
Northern Greece
|
| locatedOnContinent | Europe ⓘ |
| namedAfter | Ptolemy ⓘ |
| near | Kozani ⓘ |
| operatedBy |
Public Power Corporation of Greece
ⓘ
linked to:
Public Power Corporation (PPC) of Greece
|
| partOf |
Ptolemaida Basin
ⓘ
municipality of Eordaia ⓘ |
| postalCode | 50200 ⓘ |
| regionalUnit |
Kozani regional unit
ⓘ
linked to:
Kozani (regional unit)
|
| religion | predominantly Eastern Orthodox Christianity ⓘ |
| role | major energy production center of Greece ⓘ |
| timeZone | Eastern European Time ⓘ |
| timeZoneDST | Eastern European Summer Time ⓘ |
| transport | served by road network connecting to Kozani and Florina ⓘ |
| urbanType | industrial city ⓘ |
| writingSystem | Greek alphabet ⓘ |
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: Ptolemaida Description of subject: Ptolemaida is a city in northern Greece known for its significant lignite mines and power plants, making it an important center of the country’s energy production.
Referenced by (23)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Ptolemaida