U. S. Steel Mining
E12065
U. S. Steel Mining is a mining subsidiary of United States Steel Corporation that focuses on extracting and supplying raw materials, primarily coal and iron ore, for steel production.
All labels observed (2)
| Label | Occurrences |
|---|---|
| U. S. Steel Mining canonical | 1 |
| U.S. Steel coal operations | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T21956 — 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: U. S. Steel Mining Context triple: [United States Steel Corporation, hasSubsidiary, U. S. Steel Mining]
-
A.
National Steel Company
National Steel Company was a major early American steel producer that became part of the conglomerate later known as U.S. Steel.
-
B.
Federal Steel Company
Federal Steel Company was a major late-19th-century American steel producer that became one of the principal constituents of the newly formed United States Steel Corporation.
-
C.
Carnegie Steel Company
Carnegie Steel Company was a dominant late-19th-century American steel producer that played a central role in the expansion of the U.S. steel industry and the rise of modern industrial capitalism.
-
D.
United States Steel Corporation
United States Steel Corporation is a major American steel-producing company formed in 1901 through the consolidation of several steel businesses, becoming the world’s first billion-dollar corporation.
-
E.
U. S. Steel Košice
U. S. Steel Košice is a large integrated steel production plant in Košice, Slovakia, operated by United States Steel Corporation and serving as one of Central Europe’s key steel manufacturers.
- 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: U. S. Steel Mining Target entity description: U. S. Steel Mining is a mining subsidiary of United States Steel Corporation that focuses on extracting and supplying raw materials, primarily coal and iron ore, for steel production.
-
A.
National Steel Company
National Steel Company was a major early American steel producer that became part of the conglomerate later known as U.S. Steel.
-
B.
Federal Steel Company
Federal Steel Company was a major late-19th-century American steel producer that became one of the principal constituents of the newly formed United States Steel Corporation.
-
C.
Carnegie Steel Company
Carnegie Steel Company was a dominant late-19th-century American steel producer that played a central role in the expansion of the U.S. steel industry and the rise of modern industrial capitalism.
-
D.
United States Steel Corporation
United States Steel Corporation is a major American steel-producing company formed in 1901 through the consolidation of several steel businesses, becoming the world’s first billion-dollar corporation.
-
E.
U. S. Steel Košice
U. S. Steel Košice is a large integrated steel production plant in Košice, Slovakia, operated by United States Steel Corporation and serving as one of Central Europe’s key steel manufacturers.
- F. None of above. chosen
Statements (15)
| Predicate | Object |
|---|---|
| instanceOf |
mining company
ⓘ
subsidiary ⓘ |
| businessModel | captive mining for parent steel producer ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| focusesOn |
extraction of coal
ⓘ
extraction of iron ore ⓘ |
| industry |
coal mining
ⓘ
iron ore mining ⓘ mining industry ⓘ |
| parentCompany | United States Steel Corporation ⓘ |
| product |
coal
ⓘ
iron ore ⓘ |
| purpose | supply raw materials for steel production ⓘ |
| sector | raw materials ⓘ |
| suppliesTo | United States Steel Corporation ⓘ |
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: U. S. Steel Mining Description of subject: U. S. Steel Mining is a mining subsidiary of United States Steel Corporation that focuses on extracting and supplying raw materials, primarily coal and iron ore, for steel production.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
U.S. Steel coal operations