22,000 lb Grand Slam bomb
E170939
The 22,000 lb Grand Slam bomb was a massive British "earthquake" bomb of World War II designed to penetrate and destroy heavily fortified targets such as bunkers, viaducts, and submarine pens.
All labels observed (1)
| Label | Occurrences |
|---|---|
| 22,000 lb Grand Slam bomb canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1487710 — 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: 22,000 lb Grand Slam bomb Context triple: [Avro Lancaster, armament, 22,000 lb Grand Slam bomb]
-
A.
Mk 83 bomb
The Mk 83 bomb is a 1,000-pound class general-purpose unguided aerial bomb widely used by military aircraft and often employed as the warhead for various precision-guided munition systems.
-
B.
Mk 82 bomb
The Mk 82 bomb is a widely used 500-pound general-purpose unguided aerial bomb that serves as the standard warhead for many precision-guided munitions.
-
C.
BLU-109 bomb
The BLU-109 bomb is a U.S.-designed hardened-penetrator warhead used to destroy reinforced or deeply buried targets, often integrated into precision-guided munition systems.
-
D.
Mk 84 bomb
The Mk 84 bomb is a 2,000-pound class general-purpose unguided bomb widely used by the U.S. and allied air forces as the warhead basis for various precision-guided munitions.
-
E.
Tallboy bomb
The Tallboy bomb was a British World War II "earthquake" bomb designed by Barnes Wallis to destroy heavily fortified and hardened targets through deep-penetration shock waves.
- 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: 22,000 lb Grand Slam bomb Target entity description: The 22,000 lb Grand Slam bomb was a massive British "earthquake" bomb of World War II designed to penetrate and destroy heavily fortified targets such as bunkers, viaducts, and submarine pens.
-
A.
Mk 83 bomb
The Mk 83 bomb is a 1,000-pound class general-purpose unguided aerial bomb widely used by military aircraft and often employed as the warhead for various precision-guided munition systems.
-
B.
Mk 82 bomb
The Mk 82 bomb is a widely used 500-pound general-purpose unguided aerial bomb that serves as the standard warhead for many precision-guided munitions.
-
C.
BLU-109 bomb
The BLU-109 bomb is a U.S.-designed hardened-penetrator warhead used to destroy reinforced or deeply buried targets, often integrated into precision-guided munition systems.
-
D.
Mk 84 bomb
The Mk 84 bomb is a 2,000-pound class general-purpose unguided bomb widely used by the U.S. and allied air forces as the warhead basis for various precision-guided munitions.
-
E.
Tallboy bomb
The Tallboy bomb was a British World War II "earthquake" bomb designed by Barnes Wallis to destroy heavily fortified and hardened targets through deep-penetration shock waves.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
bomb
ⓘ
conventional bomb ⓘ earthquake bomb ⓘ |
| alsoKnownAs |
Bomb, Medium Capacity, 22,000 lb
ⓘ
Grand Slam ⓘ |
| bodyMaterial | steel ⓘ |
| category |
aerial bomb
ⓘ
bunker buster ⓘ |
| conflict | World War II ⓘ |
| countryOfOrigin | United Kingdom ⓘ |
| deliveryPlatformType | heavy bomber ⓘ |
| deploymentMethod | high-altitude drop ⓘ |
| designer | Barnes Wallis ⓘ |
| designPurpose |
create underground shock waves
ⓘ
destroy bunkers ⓘ destroy heavily fortified targets ⓘ destroy submarine pens ⓘ destroy viaducts ⓘ penetrate reinforced concrete ⓘ |
| detonationMode | delayed-action fuse ⓘ |
| developmentPeriod | early 1940s ⓘ |
| diameter |
approximately 1.17 m
ⓘ
approximately 3 ft 10 in ⓘ |
| era | 20th century ⓘ |
| explosiveType | high explosive ⓘ |
| fillingMass |
approximately 1880 kg
ⓘ
approximately 4144 lb ⓘ |
| firstUseDate | 1945 ⓘ |
| guidance | unguided ⓘ |
| historicalSignificance | pioneering large earthquake bomb design ⓘ |
| inventorNationality | British ⓘ |
| launchedFrom |
Avro Lancaster
ⓘ
surface form:
Avro Lancaster bomber
|
| length |
approximately 26 ft
ⓘ
approximately 7.9 m ⓘ |
| mass |
22000 lb
ⓘ
9979 kg ⓘ |
| notableFeature | one of the largest conventional bombs used in World War II ⓘ |
| operatedBy |
Royal Air Force Bomber Command
ⓘ
surface form:
RAF Bomber Command
|
| operationalUse |
attacks on German viaducts
ⓘ
attacks on U-boat pens ⓘ attacks on hardened bunkers ⓘ |
| penetrationCapability | deep penetration into soil and concrete before detonation ⓘ |
| relatedWeapon | 12,000 lb Tallboy bomb ⓘ |
| specificCarrierAircraftVariant |
Avro Lancaster
ⓘ
surface form:
Avro Lancaster B.Mk I (Special)
|
| strategicRole | strategic bombing of hardened targets ⓘ |
| usedBy | Royal Air Force ⓘ |
| warheadFilling | Torpex ⓘ |
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: 22,000 lb Grand Slam bomb Description of subject: The 22,000 lb Grand Slam bomb was a massive British "earthquake" bomb of World War II designed to penetrate and destroy heavily fortified targets such as bunkers, viaducts, and submarine pens.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.