Northern Coalfields Limited
E491955
Northern Coalfields Limited is an Indian state-owned coal mining company and a major subsidiary of Coal India Limited, primarily operating large open-cast mines in the Singrauli coalfields.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Coal India Limited | 1 |
| Northern Coalfields Limited canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5075790 — 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: Northern Coalfields Limited Context triple: [Singrauli, hasMajorCompany, Northern Coalfields Limited]
-
A.
Mishra Dhatu Nigam Limited
Mishra Dhatu Nigam Limited is an Indian public sector company specializing in the manufacture of superalloys, special steels, and titanium alloys primarily for strategic sectors such as defence, space, and nuclear energy.
-
B.
British Steel Corporation
British Steel Corporation was the former state-owned steel producer in the United Kingdom, created in 1967 by nationalizing major steel companies before later being privatized.
-
C.
NHPC Limited
NHPC Limited is an Indian government-owned hydropower company that develops, operates, and maintains large hydroelectric projects across the country.
-
D.
Hindalco Industries
Hindalco Industries is a leading Indian metals company, primarily engaged in aluminium and copper production, and is part of the Aditya Birla Group conglomerate.
-
E.
Bokaro coalfield
Bokaro coalfield is a major coal-producing region in Jharkhand, India, known for its extensive reserves of high-quality coking coal that support the country’s steel and power industries.
- 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: Northern Coalfields Limited Target entity description: Northern Coalfields Limited is an Indian state-owned coal mining company and a major subsidiary of Coal India Limited, primarily operating large open-cast mines in the Singrauli coalfields.
-
A.
Mishra Dhatu Nigam Limited
Mishra Dhatu Nigam Limited is an Indian public sector company specializing in the manufacture of superalloys, special steels, and titanium alloys primarily for strategic sectors such as defence, space, and nuclear energy.
-
B.
British Steel Corporation
British Steel Corporation was the former state-owned steel producer in the United Kingdom, created in 1967 by nationalizing major steel companies before later being privatized.
-
C.
NHPC Limited
NHPC Limited is an Indian government-owned hydropower company that develops, operates, and maintains large hydroelectric projects across the country.
-
D.
Hindalco Industries
Hindalco Industries is a leading Indian metals company, primarily engaged in aluminium and copper production, and is part of the Aditya Birla Group conglomerate.
-
E.
Bokaro coalfield
Bokaro coalfield is a major coal-producing region in Jharkhand, India, known for its extensive reserves of high-quality coking coal that support the country’s steel and power industries.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
coal mining company
ⓘ
state-owned enterprise ⓘ |
| country | India ⓘ |
| focusesOn | large-scale open-cast coal mining ⓘ |
| governingMinistry | Ministry of Coal, Government of India NERFINISHED ⓘ |
| hasAbbreviation | NCL NERFINISHED ⓘ |
| hasMiningArea |
Madhya Pradesh
NERFINISHED
ⓘ
Uttar Pradesh NERFINISHED ⓘ |
| headquartersLocation | Singrauli NERFINISHED ⓘ |
| headquartersState | Madhya Pradesh NERFINISHED ⓘ |
| industry | coal mining ⓘ |
| isMajorSubsidiaryOf | Coal India Limited NERFINISHED ⓘ |
| isPartOf | Coal India group NERFINISHED ⓘ |
| isSubsidiaryOf | Coal India Limited NERFINISHED ⓘ |
| legalForm | public limited company ⓘ |
| listedUnder | Companies Act, 1956 NERFINISHED ⓘ |
| miningMethod | open-cast mining ⓘ |
| operatesIn | Singrauli coalfields NERFINISHED ⓘ |
| ownership | Government of India NERFINISHED ⓘ |
| parentOrganization | Coal India Limited NERFINISHED ⓘ |
| primaryProduct |
non-coking coal
ⓘ
thermal coal ⓘ |
| regionServed | India ⓘ |
| sector | public sector ⓘ |
| servesIndustry |
cement
ⓘ
fertilizer ⓘ power generation ⓘ |
| suppliesTo |
independent power producers
ⓘ
state-owned power utilities ⓘ |
| type | Miniratna company ⓘ |
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: Northern Coalfields Limited Description of subject: Northern Coalfields Limited is an Indian state-owned coal mining company and a major subsidiary of Coal India Limited, primarily operating large open-cast mines in the Singrauli coalfields.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Coal India Limited