Upkeep bouncing bomb
E44570
The Upkeep bouncing bomb was a specially designed British World War II explosive devised by Barnes Wallis to skip over water and breach German dams during the famous Dambusters raid.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Upkeep bouncing bomb canonical | 4 |
| Upkeep bomb | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T352005 — 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: Upkeep bouncing bomb Context triple: [Operation Chastise, usedWeapon, Upkeep bouncing bomb]
-
A.
Bomb Squad
The Bomb Squad is a specialized Massachusetts State Police unit responsible for detecting, handling, and safely disposing of explosive devices and related hazards.
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B.
Las Bombas
Las Bombas is a Metrobús station in Mexico City that serves as a terminus on Line 5 of the bus rapid transit system.
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C.
Bombing Bernard
Bombing Bernard is the wartime nickname of Bernhard von Galen, the 17th-century Prince-Bishop of Münster known for his fierce resistance to foreign powers and heavy use of artillery.
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D.
B Reactor
B Reactor is the world’s first full-scale plutonium production reactor, built during the Manhattan Project at the Hanford Site in Washington State.
-
E.
Blitz
The Blitz was the sustained German bombing campaign against the United Kingdom, particularly London, during 1940–1941 in World War II.
- 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: Upkeep bouncing bomb Target entity description: The Upkeep bouncing bomb was a specially designed British World War II explosive devised by Barnes Wallis to skip over water and breach German dams during the famous Dambusters raid.
-
A.
Bomb Squad
The Bomb Squad is a specialized Massachusetts State Police unit responsible for detecting, handling, and safely disposing of explosive devices and related hazards.
-
B.
Las Bombas
Las Bombas is a Metrobús station in Mexico City that serves as a terminus on Line 5 of the bus rapid transit system.
-
C.
Bombing Bernard
Bombing Bernard is the wartime nickname of Bernhard von Galen, the 17th-century Prince-Bishop of Münster known for his fierce resistance to foreign powers and heavy use of artillery.
-
D.
B Reactor
B Reactor is the world’s first full-scale plutonium production reactor, built during the Manhattan Project at the Hanford Site in Washington State.
-
E.
Blitz
The Blitz was the sustained German bombing campaign against the United Kingdom, particularly London, during 1940–1941 in World War II.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
British World War II weapon
ⓘ
aerial bomb ⓘ bouncing bomb ⓘ |
| alsoKnownAs |
Dambuster bomb
ⓘ
Upkeep ⓘ |
| conflict |
World War II
ⓘ
surface form:
Second World War
|
| countryOfOrigin | United Kingdom ⓘ |
| deliveryPlatform | Avro Lancaster ⓘ |
| deploymentAltitude | about 60 feet above water ⓘ |
| deploymentSpeed | about 220 miles per hour ⓘ |
| designedTo |
detonate against dam walls underwater
ⓘ
evade torpedo nets ⓘ skip across water ⓘ |
| designer | Barnes Wallis ⓘ |
| detonationMethod | hydrostatic fuse ⓘ |
| developer | Vickers-Armstrongs ⓘ |
| era | 1940s ⓘ |
| explosiveMass | approximately 6,600 pounds of Torpex ⓘ |
| explosiveType | high explosive ⓘ |
| filling | Torpex ⓘ |
| firstCombatUseDate | 16–17 May 1943 ⓘ |
| guidanceSystem | unguided ⓘ |
| influencedBy | Barnes Wallis’s earlier bouncing bomb concepts ⓘ |
| launchMethod | air-dropped ⓘ |
| mass | approximately 9,250 pounds total ⓘ |
| notableFor |
innovative bouncing delivery over water
ⓘ
use in the Dambusters raid ⓘ |
| operation | Operation Chastise ⓘ |
| operatorRequirement |
accurate approach heading
ⓘ
precise height control ⓘ precise speed control ⓘ |
| primaryTarget |
Eder Dam
ⓘ
Möhne Dam ⓘ Sorpe Dam ⓘ |
| primaryUse | breaching dams ⓘ |
| productionStatus | limited production ⓘ |
| shape | cylindrical ⓘ |
| specificDeliveryPlatform |
Avro Lancaster
ⓘ
surface form:
Avro Lancaster B Mark III Special
|
| spinDirection | backspin ⓘ |
| spinRate | about 500 rpm ⓘ |
| status | retired ⓘ |
| survivingExamples | museum exhibits and replicas only ⓘ |
| testedAt |
Chesil Beach
ⓘ
Reculver, Kent ⓘ |
| theatre | European theatre of World War II ⓘ |
| usedBy |
No. 617 Squadron RAF
ⓘ
Royal Air Force ⓘ |
| yearOfIntroduction | 1943 ⓘ |
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: Upkeep bouncing bomb Description of subject: The Upkeep bouncing bomb was a specially designed British World War II explosive devised by Barnes Wallis to skip over water and breach German dams during the famous Dambusters raid.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Avro Lancaster
this entity surface form:
Upkeep bomb
subject surface form:
Avro Lancaster