Minntac Mine
E861743
Minntac Mine is a large taconite iron ore mining and processing operation in Minnesota and one of the major producers of iron ore pellets in the United States.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Minntac Mine canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10402320 — 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: Minntac Mine Context triple: [Mesabi Range, containsMine, Minntac Mine]
-
A.
Andoom Mine
Andoom Mine is a major bauxite mining operation near Weipa in Queensland, Australia, contributing significantly to the region’s aluminum ore production.
-
B.
Tilly Foster Mine
Tilly Foster Mine is a historic iron ore mine in Putnam County, New York, noted for its rich mineral deposits and role in the region’s 19th-century mining industry.
-
C.
Hollinger Mine
Hollinger Mine was one of the largest and most productive gold mines in Canada, central to the development of Timmins, Ontario and the Porcupine mining district.
-
D.
Geita Gold Mine
Geita Gold Mine is one of Tanzania’s largest open-pit gold mines, operated by AngloGold Ashanti and located near the town of Geita in the country’s northwest.
-
E.
Bullfrog Mine
Bullfrog Mine was a prominent early 20th-century gold mine in Nevada that gave its name to the surrounding Bullfrog mining district and helped spur the regional mining boom.
- 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: Minntac Mine Target entity description: Minntac Mine is a large taconite iron ore mining and processing operation in Minnesota and one of the major producers of iron ore pellets in the United States.
-
A.
Andoom Mine
Andoom Mine is a major bauxite mining operation near Weipa in Queensland, Australia, contributing significantly to the region’s aluminum ore production.
-
B.
Tilly Foster Mine
Tilly Foster Mine is a historic iron ore mine in Putnam County, New York, noted for its rich mineral deposits and role in the region’s 19th-century mining industry.
-
C.
Hollinger Mine
Hollinger Mine was one of the largest and most productive gold mines in Canada, central to the development of Timmins, Ontario and the Porcupine mining district.
-
D.
Geita Gold Mine
Geita Gold Mine is one of Tanzania’s largest open-pit gold mines, operated by AngloGold Ashanti and located near the town of Geita in the country’s northwest.
-
E.
Bullfrog Mine
Bullfrog Mine was a prominent early 20th-century gold mine in Nevada that gave its name to the surrounding Bullfrog mining district and helped spur the regional mining boom.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
iron ore mine
ⓘ
open-pit mine ⓘ taconite mine ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| employerIn | St. Louis County, Minnesota NERFINISHED ⓘ |
| endUseIndustry | steel manufacturing ⓘ |
| hasEnvironmentalImpact |
air emissions from taconite processing
ⓘ
tailings generation ⓘ |
| hasFacility | taconite processing plant ⓘ |
| hasPermitType |
air quality permit
ⓘ
mining permit ⓘ water discharge permit ⓘ |
| hasProcess |
concentrating
ⓘ
crushing ⓘ pelletizing ⓘ |
| industry |
iron and steel industry
ⓘ
mining industry ⓘ |
| isInEconomicRegion | US Great Lakes steel corridor NERFINISHED ⓘ |
| locatedIn |
Minnesota
ⓘ
St. Louis County, Minnesota NERFINISHED ⓘ |
| locatedInRegion | Iron Range of Minnesota NERFINISHED ⓘ |
| locatedNear | Mountain Iron, Minnesota NERFINISHED ⓘ |
| locatedOnGeologicFeature | Biwabik Iron Formation GENERATED ⓘ |
| mineral | iron ore ⓘ |
| miningMethod | surface mining ⓘ |
| operatedBy | United States Steel Corporation NERFINISHED ⓘ |
| oreType | taconite ⓘ |
| ownedBy | United States Steel Corporation NERFINISHED ⓘ |
| partOf | Mesabi Range NERFINISHED ⓘ |
| product |
iron ore pellets
ⓘ
taconite pellets ⓘ |
| railConnection | served by regional rail lines for pellet transport ⓘ |
| regulator |
Minnesota Department of Natural Resources
NERFINISHED
ⓘ
Minnesota Pollution Control Agency NERFINISHED ⓘ United States Environmental Protection Agency NERFINISHED ⓘ |
| resourceType | ferrous ore ⓘ |
| significance |
major producer of iron ore pellets in the United States
ⓘ
one of the largest taconite operations in the United States ⓘ |
| transportMode | rail ⓘ |
| usedFor | production of iron ore for steelmaking ⓘ |
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: Minntac Mine Description of subject: Minntac Mine is a large taconite iron ore mining and processing operation in Minnesota and one of the major producers of iron ore pellets in the United States.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.