Coal
E225134
Coal is a combustible black or brownish-black sedimentary rock formed from ancient plant matter, widely used as a fossil fuel for electricity generation and industrial processes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Coal canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T2021063 — 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: Coal Context triple: [Powder, isOneOfMascotsWith, Coal]
-
A.
Carbon
Carbon is a now-deprecated C-based application programming interface (API) for macOS that was designed to help developers port and run classic Mac OS applications on Mac OS X.
-
B.
Wande Coal
Wande Coal is a Nigerian singer and songwriter known for his influential role in modern Afrobeats and his smooth, soulful vocal style.
-
C.
Jharia coalfield
Jharia coalfield is one of India’s largest and oldest coal mining regions, renowned for its rich coking coal reserves and long-standing underground coal fires.
-
D.
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.
-
E.
ARM Coal
ARM Coal is the coal mining division of African Rainbow Minerals, focused on the exploration, production, and sale of coal resources.
- 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: Coal Target entity description: Coal is a combustible black or brownish-black sedimentary rock formed from ancient plant matter, widely used as a fossil fuel for electricity generation and industrial processes.
-
A.
Carbon
Carbon is a now-deprecated C-based application programming interface (API) for macOS that was designed to help developers port and run classic Mac OS applications on Mac OS X.
-
B.
Wande Coal
Wande Coal is a Nigerian singer and songwriter known for his influential role in modern Afrobeats and his smooth, soulful vocal style.
-
C.
Jharia coalfield
Jharia coalfield is one of India’s largest and oldest coal mining regions, renowned for its rich coking coal reserves and long-standing underground coal fires.
-
D.
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.
-
E.
ARM Coal
ARM Coal is the coal mining division of African Rainbow Minerals, focused on the exploration, production, and sale of coal resources.
- F. None of above. chosen
Statements (67)
| Predicate | Object |
|---|---|
| instanceOf |
Combustible material
ⓘ
Fossil fuel ⓘ Sedimentary rock ⓘ |
| associatedHealthImpact |
Cardiovascular diseases
ⓘ
Occupational lung diseases in miners ⓘ Respiratory diseases ⓘ |
| canBeProcessedInto |
Coal gas
ⓘ
Coal tar ⓘ Coke ⓘ Synthetic fuels ⓘ |
| color |
Black
ⓘ
Brownish-black ⓘ |
| combustionEmits |
Carbon dioxide
ⓘ
Mercury ⓘ Nitrogen oxides ⓘ Particulate matter ⓘ Sulfur dioxide ⓘ |
| combustionTechnology |
Fluidized bed combustion
ⓘ
Integrated gasification combined cycle ⓘ Pulverized coal combustion ⓘ |
| contains |
Carbon
ⓘ
Hydrogen ⓘ Mineral matter ⓘ Nitrogen ⓘ Oxygen ⓘ Sulfur ⓘ |
| environmentalImpact |
Causes land disturbance from mining
ⓘ
Contributes to acid rain ⓘ Contributes to air pollution ⓘ Generates coal ash waste ⓘ Major source of greenhouse gas emissions ⓘ |
| extractedBy |
Mountaintop removal mining
ⓘ
Open-pit mining ⓘ Surface mining ⓘ Underground mining ⓘ |
| formedByProcess |
Burial and compaction of plant material
ⓘ
Coalification ⓘ |
| geologicalAge |
Also formed in Permian and later periods
ⓘ
Primarily Carboniferous period ⓘ |
| hasOrigin | Ancient plant matter ⓘ |
| hasType |
Anthracite
ⓘ
Bituminous coal ⓘ Lignite ⓘ Peat (precursor) ⓘ Sub-bituminous coal ⓘ |
| higherRankHas |
Higher carbon content
ⓘ
Higher energy content ⓘ Lower moisture content ⓘ Lower volatile matter ⓘ |
| majorConsumerCountry |
China
ⓘ
India ⓘ United States of America ⓘ
surface form:
United States
|
| majorProducerCountry |
Australia
ⓘ
China ⓘ India ⓘ Indonesia ⓘ United States of America ⓘ
surface form:
United States
|
| policyContext | Subject to climate change mitigation policies ⓘ |
| rankOrder | Peat < Lignite < Sub-bituminous < Bituminous < Anthracite ⓘ |
| trend |
Continued significant use in some developing countries
ⓘ
Declining use in many developed countries ⓘ |
| usedFor |
Cement production
ⓘ
Chemical feedstock ⓘ Electricity generation ⓘ Industrial heat production ⓘ Residential heating (historically) ⓘ 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: Coal Description of subject: Coal is a combustible black or brownish-black sedimentary rock formed from ancient plant matter, widely used as a fossil fuel for electricity generation and industrial processes.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.