Supai Post Office
E405311
Supai Post Office is a remote United States Postal Service facility located in the village of Supai within the Grand Canyon, notable as one of the most isolated post offices in the country and one of the last to still receive mail by mule.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Supai Post Office canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3975997 — 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: Supai Post Office Context triple: [Supai, Arizona, hasPostOffice, Supai Post Office]
-
A.
Hopi Point
Hopi Point is one of the Grand Canyon’s most popular South Rim overlooks, renowned for its expansive panoramic views and spectacular sunrise and sunset vistas.
-
B.
Zigzag Ranger Station
Zigzag Ranger Station is a U.S. Forest Service facility in Oregon that serves as the administrative and visitor center for the surrounding Zigzag Ranger District on Mount Hood National Forest.
-
C.
Eagle Point
Eagle Point is a scenic viewpoint and tourist area on the Hualapai Indian Reservation overlooking the Grand Canyon, known for attractions like the Grand Canyon Skywalk.
-
D.
Loomis Ranger Station
Loomis Ranger Station is a National Park Service facility near the Loomis Museum in Lassen Volcanic National Park that serves as a base for park rangers’ operations and visitor services.
-
E.
Harris Point
Harris Point is a coastal headland on San Miguel Island, part of California’s remote Channel Islands in the Pacific Ocean.
- 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: Supai Post Office Target entity description: Supai Post Office is a remote United States Postal Service facility located in the village of Supai within the Grand Canyon, notable as one of the most isolated post offices in the country and one of the last to still receive mail by mule.
-
A.
Hopi Point
Hopi Point is one of the Grand Canyon’s most popular South Rim overlooks, renowned for its expansive panoramic views and spectacular sunrise and sunset vistas.
-
B.
Zigzag Ranger Station
Zigzag Ranger Station is a U.S. Forest Service facility in Oregon that serves as the administrative and visitor center for the surrounding Zigzag Ranger District on Mount Hood National Forest.
-
C.
Eagle Point
Eagle Point is a scenic viewpoint and tourist area on the Hualapai Indian Reservation overlooking the Grand Canyon, known for attractions like the Grand Canyon Skywalk.
-
D.
Loomis Ranger Station
Loomis Ranger Station is a National Park Service facility near the Loomis Museum in Lassen Volcanic National Park that serves as a base for park rangers’ operations and visitor services.
-
E.
Harris Point
Harris Point is a coastal headland on San Miguel Island, part of California’s remote Channel Islands in the Pacific Ocean.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
United States Postal Service facility
ⓘ
post office ⓘ |
| access | reachable only by foot, mule, or helicopter ⓘ |
| category |
Buildings and structures in the Grand Canyon
ⓘ
Post offices in Arizona ⓘ United States Postal Service ⓘ |
| communicationRole | primary mail and parcel hub for Supai ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| elevation | approximately 3,200 feet above sea level ⓘ |
| locatedIn |
Coconino County, Arizona
ⓘ
Grand Canyon National Park ⓘ
surface form:
Grand Canyon
Havasupai Indian Reservation ⓘ Supai, Arizona ⓘ |
| mailDeliveryMethod |
helicopter (for some supplies and emergency transport)
ⓘ
mule train ⓘ |
| mailRoute |
Hualapai Hilltop trailhead
ⓘ
surface form:
Hualapai Hilltop–Supai mule route
|
| mailTypesHandled |
letters
ⓘ
parcels ⓘ supplies for local residents and businesses ⓘ |
| notableFor |
being one of the last U.S. post offices to receive mail by mule
ⓘ
being one of the most remote post offices in the United States ⓘ |
| operator | United States Postal Service ⓘ |
| roadAccess | no direct road access ⓘ |
| serves |
Havasupai Tribe of the Havasupai Reservation
ⓘ
surface form:
Havasupai Tribe
village of Supai ⓘ |
| servesPopulation | small remote canyon community ⓘ |
| state | Arizona ⓘ |
| tourismRelation | used by hikers and tourists visiting Havasu Falls area ⓘ |
| trailDistanceFromRim | approximately 8 miles from Hualapai Hilltop trailhead ⓘ |
| transportFrequency | mule trains typically operate several times per week ⓘ |
| ZIPCode | 86435 ⓘ |
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: Supai Post Office Description of subject: Supai Post Office is a remote United States Postal Service facility located in the village of Supai within the Grand Canyon, notable as one of the most isolated post offices in the country and one of the last to still receive mail by mule.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.