Plymouth Breakwater
E101517
Plymouth Breakwater is a massive early 19th-century stone breakwater in Plymouth Sound, England, built to protect the naval anchorage and harbor from the open sea.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Plymouth Breakwater canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T795693 — 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: Plymouth Breakwater Context triple: [John Rennie the Elder, notableWork, Plymouth Breakwater]
-
A.
Blackrock Pier
Blackrock Pier is a small coastal pier and local landmark in the village of Blackrock in County Cork, Ireland, used for leisure, fishing, and waterfront access.
-
B.
Newport Arch
Newport Arch is a well-preserved Roman city gate in Lincoln, England, and one of the finest surviving examples of its kind in Britain.
-
C.
Chatham Lighthouse
Chatham Lighthouse is a historic coastal beacon on Cape Cod in Massachusetts, renowned for guiding ships through the treacherous waters off Chatham.
-
D.
Portsmouth Harbour
Portsmouth Harbour is a natural harbour on England’s south coast that serves as a major Royal Navy base and maritime hub for the city of Portsmouth.
-
E.
Plymouth Hoe
Plymouth Hoe is a historic waterfront promenade and public space in Plymouth, England, famed for its panoramic views over Plymouth Sound and association with Sir Francis Drake.
- 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: Plymouth Breakwater Target entity description: Plymouth Breakwater is a massive early 19th-century stone breakwater in Plymouth Sound, England, built to protect the naval anchorage and harbor from the open sea.
-
A.
Blackrock Pier
Blackrock Pier is a small coastal pier and local landmark in the village of Blackrock in County Cork, Ireland, used for leisure, fishing, and waterfront access.
-
B.
Newport Arch
Newport Arch is a well-preserved Roman city gate in Lincoln, England, and one of the finest surviving examples of its kind in Britain.
-
C.
Chatham Lighthouse
Chatham Lighthouse is a historic coastal beacon on Cape Cod in Massachusetts, renowned for guiding ships through the treacherous waters off Chatham.
-
D.
Portsmouth Harbour
Portsmouth Harbour is a natural harbour on England’s south coast that serves as a major Royal Navy base and maritime hub for the city of Portsmouth.
-
E.
Plymouth Hoe
Plymouth Hoe is a historic waterfront promenade and public space in Plymouth, England, famed for its panoramic views over Plymouth Sound and association with Sir Francis Drake.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
breakwater
ⓘ
coastal defence structure ⓘ maritime structure ⓘ |
| associatedEngineer |
John Rennie the Younger
ⓘ
George Vancouver ⓘ
surface form:
Joseph Whidbey
|
| bodyOfWater | English Channel ⓘ |
| constructionMaterialSource | quarries in the Plymouth area ⓘ |
| constructionMethod | rubble mound core with masonry facing ⓘ |
| constructionStart | 1812 ⓘ |
| constructionStartCentury | 19th century ⓘ |
| country | United Kingdom ⓘ |
| designedBy | John Rennie the Elder ⓘ |
| engineer | John Rennie the Elder ⓘ |
| fundedBy |
UK government
ⓘ
surface form:
British government
|
| hasHeritageValue | historic civil engineering work ⓘ |
| hasLighthouse | Plymouth Breakwater Lighthouse ⓘ |
| hasStructure | breakwater lighthouse ⓘ |
| historicalPeriod | Napoleonic era ⓘ |
| length |
approximately 1 mile
ⓘ
approximately 1,560 metres ⓘ |
| lighthouseCompleted | 1844 ⓘ |
| locatedIn |
Plymouth
ⓘ
surface form:
City of Plymouth
England ⓘ Plymouth Sound ⓘ southwest England ⓘ
surface form:
South West England
|
| maintainedBy | UK maritime authorities ⓘ |
| materialUsed | stone ⓘ |
| nearbyCity | Plymouth ⓘ |
| nearbyPort | HMNB Devonport ⓘ |
| notableFeature |
constructed entirely at sea
ⓘ
one of the earliest large offshore breakwaters ⓘ |
| orientation | roughly east–west ⓘ |
| partOf | defences of Plymouth Sound ⓘ |
| protects |
Plymouth Harbour
ⓘ
surface form:
Plymouth harbour
Royal Navy anchorage at Plymouth ⓘ |
| purpose |
harbour protection
ⓘ
protection from open sea swell ⓘ protection of naval anchorage ⓘ |
| separates |
Plymouth Sound
ⓘ
surface form:
Plymouth Sound from the open English Channel
|
| strategicRole | defence of Royal Navy fleet at Plymouth ⓘ |
| usedFor |
sheltering merchant shipping
ⓘ
sheltering naval vessels ⓘ |
| visibleFrom |
Drake's Island
ⓘ
Mount Batten ⓘ Plymouth Hoe ⓘ |
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: Plymouth Breakwater Description of subject: Plymouth Breakwater is a massive early 19th-century stone breakwater in Plymouth Sound, England, built to protect the naval anchorage and harbor from the open sea.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.