SF Hydro ferry
E600612
The SF Hydro ferry was a Norwegian transport vessel sunk in 1944 as part of the Allied effort to disrupt Nazi Germany’s access to heavy water for its atomic research program.
All labels observed (2)
| Label | Occurrences |
|---|---|
| SF Hydro ferry canonical | 1 |
| ferry SF Hydro | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6502768 — 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: SF Hydro ferry Context triple: [Norwegian heavy water sabotage, target, SF Hydro ferry]
-
A.
San Francisco Bay Ferry
San Francisco Bay Ferry is a public ferry service that operates passenger routes across the San Francisco Bay, connecting various waterfront cities and transit hubs in the Bay Area.
-
B.
SamTrans
SamTrans is the public bus and paratransit agency serving San Mateo County and parts of the San Francisco Bay Area.
-
C.
Seattle–Bainbridge Island ferry
The Seattle–Bainbridge Island ferry is a major Washington State Ferries route across Puget Sound that connects downtown Seattle with Bainbridge Island and serves commuters, residents, and tourists.
-
D.
City Ferry
City Ferry is a division of City Experiences that operates passenger ferry services, providing water-based transportation and sightseeing experiences.
-
E.
CityFerry
CityFerry is a network of passenger ferry services operating on Brisbane’s river, providing public transport connections between key riverside locations.
- 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: SF Hydro ferry Target entity description: The SF Hydro ferry was a Norwegian transport vessel sunk in 1944 as part of the Allied effort to disrupt Nazi Germany’s access to heavy water for its atomic research program.
-
A.
San Francisco Bay Ferry
San Francisco Bay Ferry is a public ferry service that operates passenger routes across the San Francisco Bay, connecting various waterfront cities and transit hubs in the Bay Area.
-
B.
SamTrans
SamTrans is the public bus and paratransit agency serving San Mateo County and parts of the San Francisco Bay Area.
-
C.
Seattle–Bainbridge Island ferry
The Seattle–Bainbridge Island ferry is a major Washington State Ferries route across Puget Sound that connects downtown Seattle with Bainbridge Island and serves commuters, residents, and tourists.
-
D.
City Ferry
City Ferry is a division of City Experiences that operates passenger ferry services, providing water-based transportation and sightseeing experiences.
-
E.
CityFerry
CityFerry is a network of passenger ferry services operating on Brisbane’s river, providing public transport connections between key riverside locations.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
Norwegian transport vessel
ⓘ
ferry ⓘ |
| carried | heavy water produced at Vemork plant ⓘ |
| causeOfDestruction | sabotage with explosives ⓘ |
| conflict |
Second World War
ⓘ
linked to:
World War II
|
| country | Norway ⓘ |
| dateOfSinking | 20 February 1944 ⓘ |
| hasCargo |
barrels of heavy water
ⓘ
industrial equipment ⓘ passengers ⓘ |
| killed |
German military personnel
ⓘ
Norwegian civilians ⓘ |
| locatedIn |
Telemark, Norway
ⓘ
linked to:
Telemark
|
| locationOfSinking | Lake Tinn ⓘ |
| operator |
Norsk Hydro
ⓘ
linked to:
Norsk Hydro (historically)
|
| ownedBy |
Norsk Hydro
ⓘ
linked to:
Norsk Hydro (historically)
|
| partOf |
Allied effort to disrupt Nazi Germany’s atomic research program
ⓘ
German-controlled transport network in occupied Norway ⓘ Nazi Germany heavy water transport chain ⓘ Norwegian heavy water sabotage ⓘ |
| route | Lake Tinn ⓘ |
| significantFor |
Allied nuclear program countermeasures
ⓘ
Norwegian resistance history ⓘ history of nuclear weapons development ⓘ |
| status | shipwreck ⓘ |
| sunkBy |
Norwegian resistance
ⓘ
linked to:
Norwegian resistance movement
|
| sunkIn | 1944 ⓘ |
| sunkNear | Rjukan, Norway ⓘ |
| usedFor |
civilian passenger transport
ⓘ
transporting heavy water ⓘ |
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: SF Hydro ferry Description of subject: The SF Hydro ferry was a Norwegian transport vessel sunk in 1944 as part of the Allied effort to disrupt Nazi Germany’s access to heavy water for its atomic research program.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: SF Hydro ferry