Tongass Narrows
E99721
Tongass Narrows is a coastal waterway in southeastern Alaska known for its busy marine traffic, seaplane operations, and role as the main channel adjacent to the city of Ketchikan.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Tongass Narrows canonical | 12 |
How this entity was disambiguated
This entity first appeared as the object of triple T751411 — 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: Tongass Narrows Context triple: [Ketchikan, locatedOn, Tongass Narrows]
-
A.
Gastineau Channel
Gastineau Channel is a narrow tidal waterway in southeastern Alaska that separates Douglas Island from the mainland and provides the waterfront setting for the city of Juneau.
-
B.
Carquinez Pass
Carquinez Pass is a low-lying water gap in the Coast Ranges of Northern California where the Carquinez Strait cuts between the San Pablo and Suisun bays, serving as a key transportation corridor.
-
C.
Juan de Fuca Strait
Juan de Fuca Strait is a major marine channel separating Vancouver Island in Canada from Washington State in the United States, forming part of the entrance to the Salish Sea and the Pacific Ocean.
-
D.
Muskeget Channel
Muskeget Channel is a tidal waterway off the coast of Massachusetts that separates Nantucket from Martha’s Vineyard and connects the surrounding coastal waters of the Atlantic.
-
E.
Sitka Sound
Sitka Sound is a coastal inlet in southeastern Alaska known for its rich marine life, scenic islands, and role as the maritime setting for the city of Sitka.
- 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: Tongass Narrows Target entity description: Tongass Narrows is a coastal waterway in southeastern Alaska known for its busy marine traffic, seaplane operations, and role as the main channel adjacent to the city of Ketchikan.
-
A.
Gastineau Channel
Gastineau Channel is a narrow tidal waterway in southeastern Alaska that separates Douglas Island from the mainland and provides the waterfront setting for the city of Juneau.
-
B.
Carquinez Pass
Carquinez Pass is a low-lying water gap in the Coast Ranges of Northern California where the Carquinez Strait cuts between the San Pablo and Suisun bays, serving as a key transportation corridor.
-
C.
Juan de Fuca Strait
Juan de Fuca Strait is a major marine channel separating Vancouver Island in Canada from Washington State in the United States, forming part of the entrance to the Salish Sea and the Pacific Ocean.
-
D.
Muskeget Channel
Muskeget Channel is a tidal waterway off the coast of Massachusetts that separates Nantucket from Martha’s Vineyard and connects the surrounding coastal waters of the Atlantic.
-
E.
Sitka Sound
Sitka Sound is a coastal inlet in southeastern Alaska known for its rich marine life, scenic islands, and role as the maritime setting for the city of Sitka.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
coastal waterway
ⓘ
strait ⓘ |
| adjacentTo |
Ketchikan Gateway Borough
ⓘ
city of Ketchikan ⓘ
linked to:
Ketchikan
|
| bodyOfWaterType | saltwater channel ⓘ |
| connectsTo |
Clarence Strait
ⓘ
Nichols Passage ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| hasClimate | maritime climate ⓘ |
| hasEconomicRole |
supports fishing industry in Ketchikan
ⓘ
supports tourism industry in Ketchikan ⓘ supports transportation links for Ketchikan ⓘ |
| hasFacilityOnShore |
Ketchikan International Airport
ⓘ
Ketchikan seaplane bases ⓘ |
| hasFeature |
narrow channel sections
ⓘ
navigational aids ⓘ tidal currents ⓘ |
| hasHazard |
congested traffic from vessels and seaplanes
ⓘ
reduced visibility from fog and rain ⓘ |
| hasPort |
Port of Ketchikan
ⓘ
linked to:
Ketchikan Harbor
|
| hasRegulation |
seaplane operating procedures
ⓘ
vessel traffic control measures ⓘ |
| hasTransportationLink | airport ferry between Ketchikan and Gravina Island ⓘ |
| hasUse |
commercial fishing route
ⓘ
cruise ship corridor ⓘ local ferry route ⓘ marine transportation route ⓘ seaplane operations ⓘ |
| isMainChannelFor | Ketchikan ⓘ |
| isNavigatedBy |
Alaska Marine Highway ferries
ⓘ
linked to:
Alaska Marine Highway System
cruise ships ⓘ fishing vessels ⓘ pleasure craft ⓘ |
| knownFor |
busy marine traffic
ⓘ
proximity to downtown Ketchikan ⓘ seaplane traffic ⓘ |
| locatedIn |
Alaska
ⓘ
Alexander Archipelago ⓘ southeastern Alaska ⓘ |
| locatedInOrNear | Tongass National Forest ⓘ |
| nearbyIsland |
Gravina Island
ⓘ
linked to:
Annette Island
Revillagigedo Island ⓘ |
| partOf | Inside Passage ⓘ |
| region |
Pacific Northwest coastal region
ⓘ
linked to:
Pacific Northwest
|
| separates |
Gravina Island
ⓘ
Revillagigedo Island ⓘ |
| waterwayFor | access to Ketchikan waterfront ⓘ |
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: Tongass Narrows Description of subject: Tongass Narrows is a coastal waterway in southeastern Alaska known for its busy marine traffic, seaplane operations, and role as the main channel adjacent to the city of Ketchikan.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.