Grand Canyon National Park Enlargement Act of 1975
E941923
United States federal law
United States statute concerning protected areas
law affecting Indigenous land rights in the United States
public law
The Grand Canyon National Park Enlargement Act of 1975 is a U.S. federal law that expanded Grand Canyon National Park’s boundaries and restored a portion of ancestral lands to the Havasupai Tribe.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Grand Canyon National Park Enlargement Act of 1975 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11709217 — 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: Grand Canyon National Park Enlargement Act of 1975 Context triple: [Havasupai, landRestoration, Grand Canyon National Park Enlargement Act of 1975]
-
A.
Arizona Wilderness Act of 1984
The Arizona Wilderness Act of 1984 is a U.S. federal law that designated and protected numerous wilderness areas across Arizona, preserving their natural landscapes and ecosystems from development.
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B.
Colorado Wilderness Act of 1980
The Colorado Wilderness Act of 1980 is a U.S. federal law that designated and protected numerous wilderness areas in Colorado, preserving their natural character and restricting development and motorized use.
-
C.
Yellowstone National Park Protection Act
The Yellowstone National Park Protection Act is the 1872 U.S. federal law that created Yellowstone as the world’s first national park, pioneering the concept of large-scale landscape preservation.
-
D.
Utah Wilderness Act of 1984
The Utah Wilderness Act of 1984 is a U.S. federal law that designated and protected large areas of roadless public land in Utah as part of the National Wilderness Preservation System.
-
E.
Washington Wilderness Act of 1984
The Washington Wilderness Act of 1984 is a U.S. federal law that designated and expanded numerous wilderness areas in Washington State to protect their natural, undeveloped character.
- 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: Grand Canyon National Park Enlargement Act of 1975 Target entity description: The Grand Canyon National Park Enlargement Act of 1975 is a U.S. federal law that expanded Grand Canyon National Park’s boundaries and restored a portion of ancestral lands to the Havasupai Tribe.
-
A.
Arizona Wilderness Act of 1984
The Arizona Wilderness Act of 1984 is a U.S. federal law that designated and protected numerous wilderness areas across Arizona, preserving their natural landscapes and ecosystems from development.
-
B.
Colorado Wilderness Act of 1980
The Colorado Wilderness Act of 1980 is a U.S. federal law that designated and protected numerous wilderness areas in Colorado, preserving their natural character and restricting development and motorized use.
-
C.
Yellowstone National Park Protection Act
The Yellowstone National Park Protection Act is the 1872 U.S. federal law that created Yellowstone as the world’s first national park, pioneering the concept of large-scale landscape preservation.
-
D.
Utah Wilderness Act of 1984
The Utah Wilderness Act of 1984 is a U.S. federal law that designated and protected large areas of roadless public land in Utah as part of the National Wilderness Preservation System.
-
E.
Washington Wilderness Act of 1984
The Washington Wilderness Act of 1984 is a U.S. federal law that designated and expanded numerous wilderness areas in Washington State to protect their natural, undeveloped character.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
United States federal law
ⓘ
United States statute concerning protected areas ⓘ law affecting Indigenous land rights in the United States ⓘ public law ⓘ |
| appliesTo |
Grand Canyon National Park
NERFINISHED
ⓘ
Havasupai Indian Reservation NERFINISHED ⓘ lands within and adjacent to Grand Canyon National Park ⓘ |
| appliesToJurisdiction |
United States government
ⓘ
surface form:
United States federal government
|
| beneficiary |
Havasupai Tribe
NERFINISHED
ⓘ
National Park Service NERFINISHED ⓘ visitors to Grand Canyon National Park ⓘ |
| chamber |
United States House of Representatives
NERFINISHED
ⓘ
United States Senate NERFINISHED ⓘ |
| country | United States of America ⓘ |
| field |
Native American law
ⓘ
environmental law ⓘ public land law ⓘ |
| hasEffect |
expanded Grand Canyon National Park’s boundaries
ⓘ
reallocated federal public lands in Arizona ⓘ restored a portion of ancestral lands to the Havasupai Tribe ⓘ |
| legislativeBody | United States Congress ⓘ |
| location | Arizona NERFINISHED ⓘ |
| mainSubject |
expansion of Grand Canyon National Park boundaries
ⓘ
restoration of Havasupai ancestral lands ⓘ |
| partOf |
United States Indian law framework
NERFINISHED
ⓘ
United States environmental legislation ⓘ |
| purpose |
to adjust federal land management responsibilities in the Grand Canyon region
ⓘ
to enlarge Grand Canyon National Park ⓘ to recognize and restore Havasupai traditional use areas ⓘ |
| regulates | use and management of certain lands in and around Grand Canyon National Park ⓘ |
| relatedTo |
Department of the Interior
NERFINISHED
ⓘ
Grand Canyon National Park Act of 1919 NERFINISHED ⓘ Havasupai Indian Reservation NERFINISHED ⓘ National Park Service NERFINISHED ⓘ |
| subject |
Grand Canyon National Park
NERFINISHED
ⓘ
Havasupai Tribe NERFINISHED ⓘ land management ⓘ national parks ⓘ public lands ⓘ tribal land rights ⓘ |
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: Grand Canyon National Park Enlargement Act of 1975 Description of subject: The Grand Canyon National Park Enlargement Act of 1975 is a U.S. federal law that expanded Grand Canyon National Park’s boundaries and restored a portion of ancestral lands to the Havasupai Tribe.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.