Lochnagar Crater
E363957
Lochnagar Crater is a massive World War I mine crater in the Somme region of France, created by a huge British underground explosion on the first day of the Battle of the Somme and now preserved as a memorial site.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Lochnagar Crater canonical | 2 |
| Lochnagar Crater Foundation | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3504159 — 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: Lochnagar Crater Context triple: [Somme, containsFeature, Lochnagar Crater]
-
A.
Jezero Crater
Jezero Crater is an ancient impact basin on Mars that once hosted a lake and river delta, making it a prime site for studying past habitability and searching for signs of ancient life.
-
B.
Decorah crater
Decorah crater is a buried meteorite impact structure located beneath the city of Decorah in northeastern Iowa.
-
C.
Gran Cratere
Gran Cratere is the main volcanic crater and prominent summit feature of the island of Vulcano in Italy’s Aeolian archipelago.
-
D.
Sherman Crater
Sherman Crater is a prominent volcanic crater on the south side of Mount Baker in Washington State, known for its active fumaroles and role in monitoring the volcano’s geothermal and eruptive activity.
-
E.
Tao-Rusyr Caldera
Tao-Rusyr Caldera is a large volcanic caldera and prominent geological feature located on Onekotan Island in Russia’s Kuril Island chain.
- 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: Lochnagar Crater Target entity description: Lochnagar Crater is a massive World War I mine crater in the Somme region of France, created by a huge British underground explosion on the first day of the Battle of the Somme and now preserved as a memorial site.
-
A.
Jezero Crater
Jezero Crater is an ancient impact basin on Mars that once hosted a lake and river delta, making it a prime site for studying past habitability and searching for signs of ancient life.
-
B.
Decorah crater
Decorah crater is a buried meteorite impact structure located beneath the city of Decorah in northeastern Iowa.
-
C.
Gran Cratere
Gran Cratere is the main volcanic crater and prominent summit feature of the island of Vulcano in Italy’s Aeolian archipelago.
-
D.
Sherman Crater
Sherman Crater is a prominent volcanic crater on the south side of Mount Baker in Washington State, known for its active fumaroles and role in monitoring the volcano’s geothermal and eruptive activity.
-
E.
Tao-Rusyr Caldera
Tao-Rusyr Caldera is a large volcanic caldera and prominent geological feature located on Onekotan Island in Russia’s Kuril Island chain.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
World War I battlefield site
ⓘ
mine crater ⓘ war memorial ⓘ |
| battlefieldSector |
La Boisselle
ⓘ
surface form:
La Boisselle sector
|
| commemorates |
Allied soldiers of World War I
ⓘ
British soldiers of World War I ⓘ victims of the Battle of the Somme ⓘ |
| coordinatesApprox | 50.015°N 2.713°E ⓘ |
| country | France ⓘ |
| createdBy | British Army ⓘ |
| createdDuring |
Battle of the Somme
ⓘ
World War I ⓘ |
| createdOn | 1916-07-01 ⓘ |
| depthApprox |
21 metres
ⓘ
70 feet ⓘ |
| diameterApprox |
300 feet
ⓘ
90 metres ⓘ |
| explosiveChargeMassApprox |
27,000 kilograms of ammonal
ⓘ
60,000 pounds of ammonal ⓘ |
| front | Western Front ⓘ |
| hasCategory |
Somme battlefields memorials
ⓘ
surface form:
Battle of the Somme memorials
Craters in France ⓘ World War I memorials in France ⓘ |
| hasFeature |
information boards about the battle
ⓘ
memorial crosses and plaques ⓘ wooden walkway and viewing platforms ⓘ |
| languageOfSignage |
English
ⓘ
French ⓘ |
| locatedIn |
France
ⓘ
Hauts-de-France ⓘ Somme (department) ⓘ
surface form:
Somme department
|
| memorialDayEvent | annual 1 July remembrance ceremony ⓘ |
| nameOrigin | Lochnagar Street trench ⓘ |
| near |
Albert, Somme
ⓘ
La Boisselle ⓘ |
| notableFor | being one of the largest man-made mine craters of World War I ⓘ |
| openToPublic | true ⓘ |
| operationType | underground mine explosion ⓘ |
| ownedBy |
Lochnagar Crater
self-linksurface differs
ⓘ
surface form:
Lochnagar Crater Foundation
|
| partOf |
Somme battlefields memorials
ⓘ
surface form:
Somme battlefields
|
| preservedSinceApprox | 1970s ⓘ |
| region | Picardy ⓘ |
| status |
preserved
ⓘ
private memorial site ⓘ |
| tourismType | battlefield tourism site ⓘ |
| tunnelDugBy | British tunnelling companies ⓘ |
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: Lochnagar Crater Description of subject: Lochnagar Crater is a massive World War I mine crater in the Somme region of France, created by a huge British underground explosion on the first day of the Battle of the Somme and now preserved as a memorial site.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Somme
this entity surface form:
Lochnagar Crater Foundation