KeeTac Mine
E863744
KeeTac Mine is a large taconite iron ore mining and processing operation located on Minnesota’s Mesabi Iron Range.
All labels observed (2)
| Label | Occurrences |
|---|---|
| KeeTac Mine canonical | 1 |
| United Taconite Mine | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10402323 — 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: KeeTac Mine Context triple: [Mesabi Range, containsMine, KeeTac Mine]
-
A.
Tahawus mine
Tahawus mine is an abandoned iron and titanium ore mine in New York’s Adirondack Mountains, historically significant for its role in regional industry and wartime material production.
-
B.
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.
-
C.
Tioga Mine
Tioga Mine was a historic silver mining operation in the Sierra Nevada of California that gave its name to nearby Tioga Pass.
-
D.
Capps Mine
Capps Mine is a historically significant gold mine in North Carolina known for its role in the state’s early gold-mining industry.
-
E.
Dome Mine
Dome Mine is a historically significant Canadian gold mine near Timmins, Ontario, that became one of the largest and longest-operating producers to emerge from the Porcupine Gold Rush.
- 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: KeeTac Mine Target entity description: KeeTac Mine is a large taconite iron ore mining and processing operation located on Minnesota’s Mesabi Iron Range.
-
A.
Tahawus mine
Tahawus mine is an abandoned iron and titanium ore mine in New York’s Adirondack Mountains, historically significant for its role in regional industry and wartime material production.
-
B.
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.
-
C.
Tioga Mine
Tioga Mine was a historic silver mining operation in the Sierra Nevada of California that gave its name to nearby Tioga Pass.
-
D.
Capps Mine
Capps Mine is a historically significant gold mine in North Carolina known for its role in the state’s early gold-mining industry.
-
E.
Dome Mine
Dome Mine is a historically significant Canadian gold mine near Timmins, Ontario, that became one of the largest and longest-operating producers to emerge from the Porcupine Gold Rush.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
iron ore mine
ⓘ
surface mine ⓘ taconite mine ⓘ |
| commodity | iron ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| employerIn | Itasca County, Minnesota ⓘ |
| endUserIndustry | integrated steel mills ⓘ |
| hasEnvironmentalRegulation |
Minnesota state mining permits
ⓘ
U.S. federal environmental regulations ⓘ |
| hasFacility |
open-pit mine
ⓘ
processing plant ⓘ |
| hasProcess |
concentrating
ⓘ
crushing ⓘ pelletizing ⓘ |
| hasSafetyRegulation | U.S. Mine Safety and Health Administration regulations ⓘ |
| industry |
iron and steel industry
ⓘ
mining industry ⓘ |
| isOnGeologicUnit | Biwabik Iron Formation ⓘ |
| isOnIronRange | Mesabi Range ⓘ |
| languageOfWorkplace | English ⓘ |
| locatedIn |
Mesabi Iron Range
ⓘ
linked to:
Iron Range, Minnesota
Minnesota ⓘ United States ⓘ
linked to:
United States of America
|
| locatedInCounty | Itasca County, Minnesota ⓘ |
| locatedOn |
Mesabi iron formation
ⓘ
linked to:
Biwabik Iron Formation
|
| miningMethod | open-pit mining ⓘ |
| nearCity | Keewatin, Minnesota ⓘ |
| operatedBy | United States Steel Corporation ⓘ |
| operator |
U.S. Steel
ⓘ
linked to:
United States Steel Corporation
|
| oreType | taconite ⓘ |
| owner |
U.S. Steel
ⓘ
linked to:
United States Steel Corporation
|
| partOf |
U.S. Steel Minnesota Ore Operations
ⓘ
linked to:
U. S. Steel Mining
|
| processingType |
beneficiation
ⓘ
pellet production ⓘ |
| product |
iron ore concentrate
ⓘ
taconite pellets ⓘ |
| railConnection | Minnesota ore rail network ⓘ |
| region |
Mesabi Iron Range
ⓘ
linked to:
Iron Range, Minnesota
|
| regulator |
Minnesota Department of Natural Resources
ⓘ
U.S. Environmental Protection Agency ⓘ U.S. Mine Safety and Health Administration ⓘ
linked to:
Mine Safety and Health Administration
|
| resource | low‑grade iron ore ⓘ |
| state | Minnesota ⓘ |
| transportMode | rail ⓘ |
| usedFor | steel production ⓘ |
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: KeeTac Mine Description of subject: KeeTac Mine is a large taconite iron ore mining and processing operation located on Minnesota’s Mesabi Iron Range.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: KeeTac Mine