Turnagain Arm
E291232
Turnagain Arm is a dramatic, narrow inlet off Alaska’s Cook Inlet known for its extreme tides, bore tides, and surrounding mountain scenery.
All labels observed (7)
| Label | Occurrences |
|---|---|
| Turnagain Arm canonical | 23 |
| Turnagain Arm region | 4 |
| Turnagain Arm area | 1 |
| Turnagain Arm coastline | 1 |
| Turnagain Arm shoreline | 1 |
| Turnagain Arm tidal flats | 1 |
| Turnagain Arm viewpoints | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2690280 — 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: Turnagain Arm Context triple: [Southcentral Alaska, contains, Turnagain Arm]
-
A.
Valdez Glacier
Valdez Glacier is a prominent valley glacier in Alaska known for its striking ice formations and accessibility near the town of Valdez.
-
B.
Matanuska Glacier
Matanuska Glacier is a large, easily accessible valley glacier in south-central Alaska, popular for its striking ice formations and guided glacier hikes.
-
C.
Kenai
Kenai is a small coastal city on Alaska’s Kenai Peninsula known for its rich salmon fisheries and scenic views of Cook Inlet and surrounding mountains.
-
D.
Unimak Pass
Unimak Pass is a major maritime strait in the eastern Aleutian Islands of Alaska that serves as a key shipping route between the North Pacific Ocean and the Bering Sea.
-
E.
Kivalina
Kivalina is a small Inupiat village in northwestern Alaska known for its severe coastal erosion and vulnerability to climate change–driven sea level rise.
- 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: Turnagain Arm Target entity description: Turnagain Arm is a dramatic, narrow inlet off Alaska’s Cook Inlet known for its extreme tides, bore tides, and surrounding mountain scenery.
-
A.
Valdez Glacier
Valdez Glacier is a prominent valley glacier in Alaska known for its striking ice formations and accessibility near the town of Valdez.
-
B.
Matanuska Glacier
Matanuska Glacier is a large, easily accessible valley glacier in south-central Alaska, popular for its striking ice formations and guided glacier hikes.
-
C.
Kenai
Kenai is a small coastal city on Alaska’s Kenai Peninsula known for its rich salmon fisheries and scenic views of Cook Inlet and surrounding mountains.
-
D.
Unimak Pass
Unimak Pass is a major maritime strait in the eastern Aleutian Islands of Alaska that serves as a key shipping route between the North Pacific Ocean and the Bering Sea.
-
E.
Kivalina
Kivalina is a small Inupiat village in northwestern Alaska known for its severe coastal erosion and vulnerability to climate change–driven sea level rise.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
fjord-like waterway
ⓘ
inlet ⓘ |
| adjacentTo |
Alaska Railroad main line
ⓘ
linked to:
Alaska Railroad
Seward Highway ⓘ |
| boreTideDirection | travels from mouth toward head of the arm ⓘ |
| boreTideFrequency | occurs on many large tidal cycles each month ⓘ |
| boreTideHeight | up to about 6–10 feet ⓘ |
| climate | subarctic coastal ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| drainageFrom |
Placer River
ⓘ
Portage Glacier area ⓘ
linked to:
Portage Glacier Recreation Area
Twentymile River ⓘ several smaller creeks ⓘ |
| formedBy | Pleistocene glaciation ⓘ |
| geologicalFeature | glacially carved valley ⓘ |
| hasPhenomenon | tidal bore ⓘ |
| hazard |
quicksand-like mudflats
ⓘ
rapidly rising tides ⓘ |
| headLocation | near Portage Valley ⓘ |
| knownFor |
bore tides
ⓘ
dramatic mountain scenery ⓘ extreme tides ⓘ mudflats ⓘ strong tidal currents ⓘ |
| length | approximately 40 miles ⓘ |
| locatedIn |
Alaska
ⓘ
northwestern Gulf of Alaska region ⓘ |
| locatedNear | Anchorage ⓘ |
| maximumTidalRange | over 30 feet ⓘ |
| mouthLocation | near Point Possession area of upper Cook Inlet ⓘ |
| nameEtymology | reportedly from repeated need to turn again due to impassable shallows or ice ⓘ |
| nameOrigin | named by British explorer James Cook’s expedition ⓘ |
| nearbyCity | Anchorage ⓘ |
| nearbyCommunity |
Bird Creek
ⓘ
Girdwood ⓘ Indian ⓘ Portage area ⓘ |
| orientation | east–west ⓘ |
| partOf |
Cook Inlet
ⓘ
Municipality of Anchorage region ⓘ
linked to:
Municipality of Anchorage
|
| popularFor |
bore tide surfing
ⓘ
kayaking during bore tide ⓘ photography ⓘ scenic driving ⓘ wildlife viewing ⓘ |
| surroundedBy |
Chugach Mountains
ⓘ
Kenai Mountains vicinity ⓘ |
| tideType | macrotidal ⓘ |
| wildlife |
Dall sheep
ⓘ
bald eagles ⓘ beluga whales ⓘ moose in surrounding areas ⓘ |
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: Turnagain Arm Description of subject: Turnagain Arm is a dramatic, narrow inlet off Alaska’s Cook Inlet known for its extreme tides, bore tides, and surrounding mountain scenery.
Referenced by (32)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Turnagain Arm
linked to: Turnagain Arm
linked to: Turnagain Arm
linked to: Turnagain Arm
subject linked to:
Fire Island
linked to: Turnagain Arm
linked to: Turnagain Arm
linked to: Turnagain Arm
linked to: Turnagain Arm
linked to: Turnagain Arm