Seymour Narrows
E833042
Seymour Narrows is a notoriously turbulent and constricted marine passage in British Columbia, Canada, known for its strong tidal currents and hazardous navigation conditions.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Seymour Narrows canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9966190 — 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: Seymour Narrows Context triple: [Discovery Passage, hasSection, Seymour Narrows]
-
A.
Howe Sound
Howe Sound is a scenic network of fjords and islands on the British Columbia coast, known for its dramatic mountain backdrops, marine wildlife, and outdoor recreation.
-
B.
Manitou Passage
Manitou Passage is a key Lake Michigan shipping channel located between the Sleeping Bear Dunes mainland and the Manitou Islands, known for its navigational hazards and historic maritime significance.
-
C.
Pont Saint-Laurent
Pont Saint-Laurent is a historic bridge in Chalon-sur-Saône, France, spanning the Saône River and linking the town’s central districts.
-
D.
Saguenay Fjord
Saguenay Fjord is a dramatic glacial fjord in Quebec, Canada, known for its steep cliffs, deep waters, and rich marine and wildlife habitats.
-
E.
Port Moody Arm
Port Moody Arm is a narrow eastern extension of Burrard Inlet in Metro Vancouver, British Columbia, forming the waterfront for the city of Port Moody.
- 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: Seymour Narrows Target entity description: Seymour Narrows is a notoriously turbulent and constricted marine passage in British Columbia, Canada, known for its strong tidal currents and hazardous navigation conditions.
-
A.
Howe Sound
Howe Sound is a scenic network of fjords and islands on the British Columbia coast, known for its dramatic mountain backdrops, marine wildlife, and outdoor recreation.
-
B.
Manitou Passage
Manitou Passage is a key Lake Michigan shipping channel located between the Sleeping Bear Dunes mainland and the Manitou Islands, known for its navigational hazards and historic maritime significance.
-
C.
Pont Saint-Laurent
Pont Saint-Laurent is a historic bridge in Chalon-sur-Saône, France, spanning the Saône River and linking the town’s central districts.
-
D.
Saguenay Fjord
Saguenay Fjord is a dramatic glacial fjord in Quebec, Canada, known for its steep cliffs, deep waters, and rich marine and wildlife habitats.
-
E.
Port Moody Arm
Port Moody Arm is a narrow eastern extension of Burrard Inlet in Metro Vancouver, British Columbia, forming the waterfront for the city of Port Moody.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
marine passage
ⓘ
strait ⓘ |
| coordinatesApprox | 50.05°N 125.25°W ⓘ |
| country | Canada ⓘ |
| depth | approximately 55 metres after blasting of Ripple Rock ⓘ |
| event | explosion of Ripple Rock on 5 April 1958 ⓘ |
| hasFeature |
overfalls
ⓘ
strong tidal rapids ⓘ whirlpools ⓘ |
| hasTidalRangeInfluenceFrom |
Georgia Strait
NERFINISHED
ⓘ
Johnstone Strait NERFINISHED ⓘ |
| hazardLevel | one of the most dangerous navigable stretches of water on the British Columbia coast ⓘ |
| historicallyNotableFor | Ripple Rock underwater pinnacle NERFINISHED ⓘ |
| improvement | navigation made safer after Ripple Rock explosion ⓘ |
| knownFor |
hazardous navigation conditions
ⓘ
strong tidal currents ⓘ turbulent waters ⓘ |
| locatedIn |
British Columbia
ⓘ
Discovery Passage NERFINISHED ⓘ Strathcona Regional District NERFINISHED ⓘ |
| maximumCurrentSpeed | up to about 15 knots ⓘ |
| namedAfter | Admiral Sir George Francis Seymour NERFINISHED ⓘ |
| navigationalHazard |
restricted width
ⓘ
strong tidal streams ⓘ turbulence ⓘ |
| near |
Campbell River, British Columbia
NERFINISHED
ⓘ
Quadra Island NERFINISHED ⓘ Vancouver Island NERFINISHED ⓘ |
| ocean | Pacific Ocean ⓘ |
| partOf | Inside Passage NERFINISHED ⓘ |
| partOfRoute | major north–south coastal shipping route in British Columbia ⓘ |
| region | Central Coast of British Columbia NERFINISHED ⓘ |
| requires | careful timing with tides for transit ⓘ |
| separates |
Quadra Island
NERFINISHED
ⓘ
Vancouver Island NERFINISHED ⓘ |
| siteOf | Ripple Rock NERFINISHED ⓘ |
| surveyedBy | Royal Navy NERFINISHED ⓘ |
| usedBy |
commercial shipping
ⓘ
fishing vessels ⓘ recreational boats ⓘ |
| waterBody | Discovery Passage NERFINISHED ⓘ |
| width | approximately 750 metres at narrowest point ⓘ |
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: Seymour Narrows Description of subject: Seymour Narrows is a notoriously turbulent and constricted marine passage in British Columbia, Canada, known for its strong tidal currents and hazardous navigation conditions.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.