Second Battle of Ypres
E43152
The Second Battle of Ypres was a major First World War engagement in 1915, notorious as the site of the first large-scale use of poison gas on the Western Front and heavy fighting involving Allied forces including Canadian troops.
All labels observed (7)
| Label | Occurrences |
|---|---|
| Second Battle of Ypres canonical | 23 |
| Battle of Ypres (1915) | 1 |
| Battle of the Yser | 1 |
| City of Ypres | 1 |
| Second Battle of Ypres 1915 | 1 |
| Second Ypres | 1 |
| Ypres, 1915 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T340352 — 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: Second Battle of Ypres Context triple: [Canadian Expeditionary Force, engagement, Second Battle of Ypres]
-
A.
Battle of Verdun
The Battle of Verdun was one of the longest and bloodiest engagements of World War I, symbolizing the brutal attrition warfare on the Western Front between France and Germany in 1916.
-
B.
Battle of the Somme
The Battle of the Somme was a major and notoriously bloody 1916 World War I offensive on the Western Front, remembered for its massive casualties and limited territorial gains.
-
C.
Battle of Tannenberg
The Battle of Tannenberg was a major 1914 Eastern Front clash in World War I in which German forces decisively defeated the Russian Second Army, halting Russia’s early advance into East Prussia.
-
D.
First Battle of the Marne
The First Battle of the Marne was a pivotal 1914 World War I clash in France that halted the German advance toward Paris and ended hopes for a quick German victory on the Western Front.
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E.
Battle of Inkerman
The Battle of Inkerman was a major 1854 engagement of the Crimean War in which British and French forces repelled a large Russian attack near Sevastopol, earning a reputation as a brutal, close-quarters "soldiers' battle."
- 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: Second Battle of Ypres Target entity description: The Second Battle of Ypres was a major First World War engagement in 1915, notorious as the site of the first large-scale use of poison gas on the Western Front and heavy fighting involving Allied forces including Canadian troops.
-
A.
Battle of Verdun
The Battle of Verdun was one of the longest and bloodiest engagements of World War I, symbolizing the brutal attrition warfare on the Western Front between France and Germany in 1916.
-
B.
Battle of the Somme
The Battle of the Somme was a major and notoriously bloody 1916 World War I offensive on the Western Front, remembered for its massive casualties and limited territorial gains.
-
C.
Battle of Tannenberg
The Battle of Tannenberg was a major 1914 Eastern Front clash in World War I in which German forces decisively defeated the Russian Second Army, halting Russia’s early advance into East Prussia.
-
D.
First Battle of the Marne
The First Battle of the Marne was a pivotal 1914 World War I clash in France that halted the German advance toward Paris and ended hopes for a quick German victory on the Western Front.
-
E.
Battle of Inkerman
The Battle of Inkerman was a major 1854 engagement of the Crimean War in which British and French forces repelled a large Russian attack near Sevastopol, earning a reputation as a brutal, close-quarters "soldiers' battle."
- F. None of above. chosen
Statements (50)
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: Second Battle of Ypres Description of subject: The Second Battle of Ypres was a major First World War engagement in 1915, notorious as the site of the first large-scale use of poison gas on the Western Front and heavy fighting involving Allied forces including Canadian troops.
Referenced by (29)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
City of Ypres
subject surface form:
Western Front (World War I)
subject surface form:
Canadian Expeditionary Force
this entity surface form:
Second Ypres
this entity surface form:
Second Battle of Ypres 1915
this entity surface form:
Ypres, 1915
this entity surface form:
Battle of the Yser
this entity surface form:
Battle of Ypres (1915)