Cliff Mine
E926979
Cliff Mine is a historic 19th-century copper mine in Michigan’s Keweenaw Peninsula, notable as one of the region’s earliest and most productive early industrial mining operations.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Cliff Mine canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11403647 — 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: Cliff Mine Context triple: [Keweenaw Peninsula, hasHistoricMine, Cliff Mine]
-
A.
Minntac Mine
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.
-
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.
Champion Mine
Champion Mine is a historic iron ore mine in Michigan’s Upper Peninsula that gave its name to the nearby community of Champion.
-
D.
Andoom Mine
Andoom Mine is a major bauxite mining operation near Weipa in Queensland, Australia, contributing significantly to the region’s aluminum ore production.
-
E.
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.
- 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: Cliff Mine Target entity description: Cliff Mine is a historic 19th-century copper mine in Michigan’s Keweenaw Peninsula, notable as one of the region’s earliest and most productive early industrial mining operations.
-
A.
Minntac Mine
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.
-
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.
Champion Mine
Champion Mine is a historic iron ore mine in Michigan’s Upper Peninsula that gave its name to the nearby community of Champion.
-
D.
Andoom Mine
Andoom Mine is a major bauxite mining operation near Weipa in Queensland, Australia, contributing significantly to the region’s aluminum ore production.
-
E.
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.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
copper mine
ⓘ
historic site ⓘ |
| associatedWith |
Cornish miners
ⓘ
immigrant mining communities in Michigan ⓘ |
| continent | North America ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| currentStatus | abandoned mine ⓘ |
| currentUse |
archaeological research site
ⓘ
heritage tourism site ⓘ |
| endOfMajorOperations | 1870s ⓘ |
| era | 19th century ⓘ |
| geologicalContext | native copper deposits of the Lake Superior copper district ⓘ |
| hasFeature |
abandoned shafts
ⓘ
ruins of mine buildings ⓘ stamp mill foundations ⓘ |
| hasRemnant |
building foundations
ⓘ
cemetery associated with the mine ⓘ waste rock piles ⓘ |
| hasSettlement | Cliff Mine company town NERFINISHED ⓘ |
| heritageDesignationStatus | considered a significant historic mining landscape in Michigan ⓘ |
| historicalSignificance |
among the first successful copper mines in the Keweenaw Peninsula
ⓘ
helped establish Michigan as a major 19th-century copper producer ⓘ one of the most productive early copper mines in Michigan ⓘ |
| impact | stimulated regional economic development in the Keweenaw Peninsula ⓘ |
| industry | copper mining ⓘ |
| languageOfPlaceName | English ⓘ |
| locatedIn |
Keweenaw County, Michigan
NERFINISHED
ⓘ
Keweenaw Peninsula NERFINISHED ⓘ Michigan NERFINISHED ⓘ Upper Peninsula of Michigan ⓘ |
| locatedNear |
Eagle River, Michigan
NERFINISHED
ⓘ
Lake Superior NERFINISHED ⓘ |
| locatedOnGeologicFeature | Keweenaw Fault GENERATED ⓘ |
| miningMethod | underground mining ⓘ |
| namedAfter | nearby cliff or escarpment ⓘ |
| oneOfEarliest |
industrial copper mines in the Keweenaw Peninsula
ⓘ
large-scale copper mines in Michigan ⓘ |
| operatedBy | Pittsburgh and Boston Copper Harbor Mining Company NERFINISHED ⓘ |
| oreType | native copper in amygdaloidal basalt ⓘ |
| partOf | Keweenaw copper district NERFINISHED ⓘ |
| product | native copper ⓘ |
| significantPeriod |
1840s
ⓘ
1850s ⓘ 1860s ⓘ |
| startDate | 1845 ⓘ |
| subjectOf |
historical research on Keweenaw copper mining
ⓘ
industrial archaeology studies ⓘ |
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: Cliff Mine Description of subject: Cliff Mine is a historic 19th-century copper mine in Michigan’s Keweenaw Peninsula, notable as one of the region’s earliest and most productive early industrial mining operations.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.