Soudan Underground Mine State Park
E376744
Soudan Underground Mine State Park is a former iron mine in Minnesota that now serves as both a historic site and a deep underground laboratory used for cutting-edge physics experiments.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Soudan Underground Mine State Park canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T3644272 — 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: Soudan Underground Mine State Park Context triple: [MINOS experiment, hasFarDetectorLocation, Soudan Underground Mine State Park]
-
A.
Alabaster Caverns State Park
Alabaster Caverns State Park is a protected natural area in Oklahoma known for its large gypsum caves and opportunities for guided cavern tours and outdoor recreation.
-
B.
Cathedral Caverns State Park
Cathedral Caverns State Park is an Alabama state park famed for its massive limestone cave featuring one of the world’s largest commercial cave entrances and striking underground formations.
-
C.
Russell Cave National Monument
Russell Cave National Monument is a prehistoric archaeological site in northeastern Alabama that preserves one of the most extensively used rock shelters in the southeastern United States, documenting thousands of years of Native American habitation.
-
D.
Wonder Cave
Wonder Cave is a limestone show cave in South Africa renowned for its impressive stalactite and stalagmite formations and its location within the Cradle of Humankind World Heritage Site.
-
E.
Noatak National Preserve
Noatak National Preserve is a vast, remote Alaskan wilderness area renowned for its intact Arctic ecosystems, free-flowing Noatak River, and dramatic Brooks Range mountain scenery.
- 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: Soudan Underground Mine State Park Target entity description: Soudan Underground Mine State Park is a former iron mine in Minnesota that now serves as both a historic site and a deep underground laboratory used for cutting-edge physics experiments.
-
A.
Alabaster Caverns State Park
Alabaster Caverns State Park is a protected natural area in Oklahoma known for its large gypsum caves and opportunities for guided cavern tours and outdoor recreation.
-
B.
Cathedral Caverns State Park
Cathedral Caverns State Park is an Alabama state park famed for its massive limestone cave featuring one of the world’s largest commercial cave entrances and striking underground formations.
-
C.
Russell Cave National Monument
Russell Cave National Monument is a prehistoric archaeological site in northeastern Alabama that preserves one of the most extensively used rock shelters in the southeastern United States, documenting thousands of years of Native American habitation.
-
D.
Wonder Cave
Wonder Cave is a limestone show cave in South Africa renowned for its impressive stalactite and stalagmite formations and its location within the Cradle of Humankind World Heritage Site.
-
E.
Noatak National Preserve
Noatak National Preserve is a vast, remote Alaskan wilderness area renowned for its intact Arctic ecosystems, free-flowing Noatak River, and dramatic Brooks Range mountain scenery.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
former iron mine
ⓘ
historic site ⓘ state park ⓘ underground physics laboratory ⓘ |
| alsoKnownAs | Soudan Mine ⓘ |
| convertedToStatePark | 1963 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| depth | approximately 2,400 feet underground ⓘ |
| depthInMeters | approximately 730 meters ⓘ |
| formerUse | iron ore mine ⓘ |
| governingBody |
Minnesota Department of Natural Resources
ⓘ
surface form:
Minnesota Department of Natural Resources, Parks and Trails Division
|
| hasFeature |
headframe and hoist house
ⓘ
historic mine buildings ⓘ interpretive exhibits ⓘ surface hiking trails ⓘ underground mine tours ⓘ underground physics laboratory ⓘ |
| hasProperty |
low cosmic ray background
ⓘ
stable underground rock formation ⓘ |
| hostedExperiment |
CDMS dark matter experiment
ⓘ
MINOS experiment ⓘ
surface form:
MINOS neutrino experiment
|
| listedAs | Minnesota state historic site ⓘ |
| locatedIn |
Minnesota
ⓘ
St. Louis County, Minnesota ⓘ |
| locatedInOrNear | Soudan, Minnesota ⓘ |
| locatedInRegion | Iron Range, Minnesota ⓘ |
| managedBy | Minnesota Department of Natural Resources ⓘ |
| miningBegan | late 19th century ⓘ |
| miningEnded | 1962 ⓘ |
| nearBodyOfWater | Lake Vermilion ⓘ |
| offersActivity |
educational programs
ⓘ
guided mine tours ⓘ |
| openToPublic | yes ⓘ |
| operatedByForLab | University of Minnesota ⓘ |
| oreType | high-grade iron ore ⓘ |
| theme |
history of iron mining in Minnesota
ⓘ
industrial history ⓘ underground physics research ⓘ |
| tourAccess | cage elevator to underground level ⓘ |
| undergroundLevelUsedForLab | 27th level ⓘ |
| usedFor |
astroparticle physics experiments
ⓘ
dark matter searches ⓘ neutrino experiments ⓘ particle physics experiments ⓘ |
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: Soudan Underground Mine State Park Description of subject: Soudan Underground Mine State Park is a former iron mine in Minnesota that now serves as both a historic site and a deep underground laboratory used for cutting-edge physics experiments.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.