Ypres 1915
E667683
Ypres 1915 refers to the World War I battles around the Belgian town of Ypres, notably marked by the first large-scale use of poison gas on the Western Front.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Ypres 1915 canonical | 1 |
| Ypres, 1915 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7487593 — 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: Ypres 1915 Context triple: [Royal Montreal Regiment, hasBattleHonour, Ypres 1915]
-
A.
Ypres 1914
Ypres 1914 refers to the First World War battles around the Belgian town of Ypres in 1914, marked by intense fighting and heavy casualties during the early stages of the Western Front.
-
B.
Ypres 1917
Ypres 1917 refers to the brutal World War I fighting around the Belgian town of Ypres in 1917, including the Third Battle of Ypres (Passchendaele), noted for its horrific mud, heavy casualties, and limited territorial gains.
-
C.
Vimy 1917
Vimy 1917 refers to the First World War Battle of Vimy Ridge, a pivotal 1917 Canadian-led offensive in France noted for its strategic success and heavy casualties.
-
D.
Cambrai 1917
Cambrai 1917 refers to the First World War battle near Cambrai, France, notable for the first large-scale, coordinated use of tanks in warfare.
-
E.
Marne 1914
Marne 1914 refers to the First Battle of the Marne in World War I, a decisive Allied victory that halted the German advance toward Paris in September 1914.
- 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: Ypres 1915 Target entity description: Ypres 1915 refers to the World War I battles around the Belgian town of Ypres, notably marked by the first large-scale use of poison gas on the Western Front.
-
A.
Ypres 1914
Ypres 1914 refers to the First World War battles around the Belgian town of Ypres in 1914, marked by intense fighting and heavy casualties during the early stages of the Western Front.
-
B.
Ypres 1917
Ypres 1917 refers to the brutal World War I fighting around the Belgian town of Ypres in 1917, including the Third Battle of Ypres (Passchendaele), noted for its horrific mud, heavy casualties, and limited territorial gains.
-
C.
Vimy 1917
Vimy 1917 refers to the First World War Battle of Vimy Ridge, a pivotal 1917 Canadian-led offensive in France noted for its strategic success and heavy casualties.
-
D.
Cambrai 1917
Cambrai 1917 refers to the First World War battle near Cambrai, France, notable for the first large-scale, coordinated use of tanks in warfare.
-
E.
Marne 1914
Marne 1914 refers to the First Battle of the Marne in World War I, a decisive Allied victory that halted the German advance toward Paris in September 1914.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
World War I battle
ⓘ
military campaign ⓘ |
| alsoKnownAs | Second Battle of Ypres NERFINISHED ⓘ |
| approximateCasualties | over 100000 total casualties ⓘ |
| belligerent |
Belgium
NERFINISHED
ⓘ
British Empire ⓘ Canada NERFINISHED ⓘ France ⓘ German Empire ⓘ United Kingdom NERFINISHED ⓘ |
| combatantUsedPoisonGas | German Empire NERFINISHED ⓘ |
| commander |
Edmund Allenby
NERFINISHED
ⓘ
Erich von Falkenhayn NERFINISHED ⓘ Friedrich Bertram Sixt von Armin NERFINISHED ⓘ Herbert Plumer NERFINISHED ⓘ Julian Byng NERFINISHED ⓘ |
| conflict | World War I ⓘ |
| country | Belgium ⓘ |
| endDate | 1915-05-25 ⓘ |
| followedBy | Third Battle of Ypres NERFINISHED ⓘ |
| front | Western Front NERFINISHED ⓘ |
| hasPart |
Battle of Bellewaarde Ridge
NERFINISHED
ⓘ
Battle of Frezenberg Ridge NERFINISHED ⓘ Battle of Gravenstafel Ridge NERFINISHED ⓘ Battle of St. Julien NERFINISHED ⓘ Second Battle of Ypres NERFINISHED ⓘ |
| involvedUnit |
British Expeditionary Force
NERFINISHED
ⓘ
Canadian Expeditionary Force NERFINISHED ⓘ French colonial troops ⓘ |
| location |
Belgium
NERFINISHED
ⓘ
West Flanders NERFINISHED ⓘ Ypres NERFINISHED ⓘ |
| notableConsequence |
international condemnation of chemical warfare
ⓘ
introduction of gas masks and anti-gas measures ⓘ |
| notableFor |
first large-scale chlorine gas attack in warfare
ⓘ
first large-scale use of poison gas on the Western Front ⓘ |
| partOf |
Ypres Salient fighting
NERFINISHED
ⓘ
battles of the Ypres Salient ⓘ |
| poisonGasType | chlorine gas ⓘ |
| precededBy | First Battle of Ypres NERFINISHED ⓘ |
| result |
Allied defensive success in preventing major breakthrough
ⓘ
German tactical gains ⓘ |
| startDate | 1915-04-22 ⓘ |
| strategicObjective |
force Allied withdrawal from Ypres
ⓘ
reduce the Ypres Salient ⓘ |
| terrain | low-lying Flanders plain ⓘ |
| warTheater | European theatre of World War I NERFINISHED ⓘ |
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: Ypres 1915 Description of subject: Ypres 1915 refers to the World War I battles around the Belgian town of Ypres, notably marked by the first large-scale use of poison gas on the Western Front.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Ypres, 1915