German submarine U-81
E1013731
German submarine U-81 was a German Type VIIC U-boat of the Kriegsmarine in World War II, best known for sinking the British aircraft carrier HMS Ark Royal in 1941.
All labels observed (1)
| Label | Occurrences |
|---|---|
| German submarine U-81 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T12957572 — 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: German submarine U-81 Context triple: [HMS Ark Royal, attacker, German submarine U-81]
-
A.
German submarine U-75
German submarine U-75 was a Type VIIB U-boat of Nazi Germany's Kriegsmarine that operated during World War II, conducting Atlantic patrols and commerce raiding before being sunk in 1941.
-
B.
German submarine U-616
German submarine U-616 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine that operated in the Mediterranean during World War II, engaging Allied naval forces before being sunk in 1944.
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C.
German submarine U-96
German submarine U-96 was a Type VIIC U-boat of Nazi Germany’s Kriegsmarine in World War II, best known as the real-life inspiration for the novel and film "Das Boot."
-
D.
German submarine U-410
German submarine U-410 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine that conducted several patrols in the Mediterranean during World War II, sinking multiple Allied vessels.
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E.
German submarine U-557
German submarine U-557 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine that operated during World War II, conducting Atlantic patrols and engaging Allied naval vessels.
- 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: German submarine U-81 Target entity description: German submarine U-81 was a German Type VIIC U-boat of the Kriegsmarine in World War II, best known for sinking the British aircraft carrier HMS Ark Royal in 1941.
-
A.
German submarine U-75
German submarine U-75 was a Type VIIB U-boat of Nazi Germany's Kriegsmarine that operated during World War II, conducting Atlantic patrols and commerce raiding before being sunk in 1941.
-
B.
German submarine U-616
German submarine U-616 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine that operated in the Mediterranean during World War II, engaging Allied naval forces before being sunk in 1944.
-
C.
German submarine U-96
German submarine U-96 was a Type VIIC U-boat of Nazi Germany’s Kriegsmarine in World War II, best known as the real-life inspiration for the novel and film "Das Boot."
-
D.
German submarine U-410
German submarine U-410 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine that conducted several patrols in the Mediterranean during World War II, sinking multiple Allied vessels.
-
E.
German submarine U-557
German submarine U-557 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine that operated during World War II, conducting Atlantic patrols and engaging Allied naval vessels.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
German Type VIIC submarine
ⓘ
U-boat ⓘ World War II submarine ⓘ |
| armament |
5 × 53.3 cm torpedo tubes
ⓘ
8.8 cm SK C/35 naval gun NERFINISHED ⓘ anti-aircraft guns ⓘ |
| assignedTo |
29th U-boat Flotilla
NERFINISHED
ⓘ
7th U-boat Flotilla NERFINISHED ⓘ |
| attackDate | 13 November 1941 ⓘ |
| attackedBy | USAAF bombers NERFINISHED ⓘ |
| beam | 6.20 m ⓘ |
| builder | Bremer Vulkan NERFINISHED ⓘ |
| builtFor | Kriegsmarine NERFINISHED ⓘ |
| causeOfSinking | air raid ⓘ |
| commissionedBy | Kriegsmarine NERFINISHED ⓘ |
| commissionedOn | 26 April 1941 ⓘ |
| conflict | World War II ⓘ |
| country | Nazi Germany ⓘ |
| crewComplement | about 44 to 60 men ⓘ |
| displacementSubmerged | 871 t ⓘ |
| displacementSurfaced | 769 t ⓘ |
| draught | 4.74 m ⓘ |
| enteredMediterranean | 1941 ⓘ |
| fate | sunk in air raid at Pola on 9 January 1944 ⓘ |
| firstCommander | Friedrich Guggenberger NERFINISHED ⓘ |
| hullNumber | U-81 NERFINISHED ⓘ |
| knownFor | sinking the British aircraft carrier HMS Ark Royal ⓘ |
| laidDownOn | 11 May 1940 ⓘ |
| launchedOn | 22 February 1941 ⓘ |
| length | 67.10 m ⓘ |
| maximumSubmergedSpeed | about 7.6 knots ⓘ |
| maximumSurfaceSpeed | about 17.7 knots ⓘ |
| navalEnsign | Reichskriegsflagge NERFINISHED ⓘ |
| operationalPeriod | 1941–1944 ⓘ |
| patrolArea |
Mediterranean Sea
NERFINISHED
ⓘ
North Atlantic NERFINISHED ⓘ |
| propulsion | diesel-electric ⓘ |
| sankShip | HMS Ark Royal NERFINISHED ⓘ |
| scrappedAt | Pola NERFINISHED ⓘ |
| scrappedOn | post-war ⓘ |
| serviceBranch | Kriegsmarine NERFINISHED ⓘ |
| shipyard | Bremer Vulkan shipyard, Bremen-Vegesack NERFINISHED ⓘ |
| submarineClass | Type VIIC submarine ⓘ |
| sunkAt | Pola, Adriatic Sea NERFINISHED ⓘ |
| sunkOn | 9 January 1944 ⓘ |
| theater | Mediterranean Sea NERFINISHED ⓘ |
| torpedoed | HMS Ark Royal NERFINISHED ⓘ |
| torpedoTubesBow | 4 ⓘ |
| torpedoTubesStern | 1 ⓘ |
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: German submarine U-81 Description of subject: German submarine U-81 was a German Type VIIC U-boat of the Kriegsmarine in World War II, best known for sinking the British aircraft carrier HMS Ark Royal in 1941.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
HMS Ark Royal