Merrickville Blockhouse
E637900
Merrickville Blockhouse is a historic 19th-century defensive structure in Merrickville, Ontario, built to protect the Rideau Canal and now preserved as a national historic site.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Merrickville Blockhouse canonical | 3 |
| Merrickville Blockhouse National Historic Site | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7058285 — 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: Merrickville Blockhouse Context triple: [Merrickville Locks, hasAdjacentStructure, Merrickville Blockhouse]
-
A.
Fort Kent Blockhouse
Fort Kent Blockhouse is a historic 19th-century wooden military fortification in Fort Kent, Maine, notable for its role in the Aroostook border dispute between the United States and Britain.
-
B.
Fort Mississauga
Fort Mississauga is a historic 19th-century British military fortification located at the mouth of the Niagara River in Niagara-on-the-Lake, Ontario, Canada.
-
C.
Fort Casimir
Fort Casimir was a 17th-century Dutch colonial fort on the Delaware River that later became the site of present-day New Castle, Delaware.
-
D.
Popton Fort
Popton Fort is a 19th-century coastal artillery fort in Pembrokeshire, Wales, built to defend the Milford Haven Waterway.
-
E.
Fort Ward
Fort Ward is a historic waterfront neighborhood and former military installation on Bainbridge Island in Washington State.
- 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: Merrickville Blockhouse Target entity description: Merrickville Blockhouse is a historic 19th-century defensive structure in Merrickville, Ontario, built to protect the Rideau Canal and now preserved as a national historic site.
-
A.
Fort Kent Blockhouse
Fort Kent Blockhouse is a historic 19th-century wooden military fortification in Fort Kent, Maine, notable for its role in the Aroostook border dispute between the United States and Britain.
-
B.
Fort Mississauga
Fort Mississauga is a historic 19th-century British military fortification located at the mouth of the Niagara River in Niagara-on-the-Lake, Ontario, Canada.
-
C.
Fort Casimir
Fort Casimir was a 17th-century Dutch colonial fort on the Delaware River that later became the site of present-day New Castle, Delaware.
-
D.
Popton Fort
Popton Fort is a 19th-century coastal artillery fort in Pembrokeshire, Wales, built to defend the Milford Haven Waterway.
-
E.
Fort Ward
Fort Ward is a historic waterfront neighborhood and former military installation on Bainbridge Island in Washington State.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
19th-century building
ⓘ
blockhouse ⓘ historic site ⓘ military structure ⓘ |
| architecturalStyle | defensive military architecture ⓘ |
| associatedWith |
Merrickville locks
ⓘ
linked to:
Merrickville Locks
Rideau Canal ⓘ |
| builtFor | British military authorities ⓘ |
| category |
Buildings and structures in Leeds and Grenville United Counties
ⓘ
Military history of Canada ⓘ |
| constructionEndDate | 1832 ⓘ |
| constructionStartDate | 1832 ⓘ |
| country | Canada ⓘ |
| currentUse |
museum
ⓘ
tourist attraction ⓘ |
| defensiveRole | protect canal works from attack ⓘ |
| era | post-War of 1812 defensive works ⓘ |
| function |
barracks
ⓘ
canal protection ⓘ defensive stronghold ⓘ |
| heritageDesignation |
National Historic Site of Canada
ⓘ
part of the Rideau Canal UNESCO World Heritage Site ⓘ |
| historicalPeriod | 19th century ⓘ |
| locatedIn |
Canada
ⓘ
Merrickville, Ontario ⓘ
linked to:
Merrickville–Wolford, Ontario
Ontario ⓘ |
| locatedOn | Rideau Canal ⓘ |
| managingOrganization | Parks Canada ⓘ |
| material |
stone
ⓘ
timber ⓘ |
| municipality | Merrickville–Wolford ⓘ |
| near |
Merrickville lockstation
ⓘ
linked to:
Merrickville Locks
|
| numberOfStoreys | 2 ⓘ |
| openToPublic | yes ⓘ |
| ownership |
Government of Canada
ⓘ
linked to:
Canadian federal government (Ottawa)
|
| partOf |
Merrickville lockstation complex
ⓘ
linked to:
Merrickville Locks
|
| preservationStatus | preserved ⓘ |
| province | Ontario ⓘ |
| purpose | defend the Rideau Canal ⓘ |
| region | Eastern Ontario ⓘ |
| significance |
example of 19th-century Canadian military engineering
ⓘ
part of the defensive system for the Rideau Canal ⓘ |
| tourismRegion |
Rideau Canal corridor
ⓘ
linked to:
Rideau Corridor
|
| visitorActivity |
guided tours
ⓘ
heritage interpretation ⓘ |
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: Merrickville Blockhouse Description of subject: Merrickville Blockhouse is a historic 19th-century defensive structure in Merrickville, Ontario, built to protect the Rideau Canal and now preserved as a national historic site.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
National Historic Sites of Canada in Ontario
→
includes
→
Merrickville Blockhouse National Historic Site
ⓘ
linked to: Merrickville Blockhouse
subject linked to:
Rideau Canal locks