Raffles Lighthouse
E555198
Raffles Lighthouse is a historic offshore lighthouse in Singapore that aids maritime navigation at the southern entrance of the Singapore Strait.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Raffles Lighthouse canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5933141 — 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: Raffles Lighthouse Context triple: [Raffles, hasNamesake, Raffles Lighthouse]
-
A.
Hook Lighthouse
Hook Lighthouse is one of the world’s oldest operational lighthouses, located on the Hook Peninsula in County Wexford, Ireland, and is a prominent maritime landmark and tourist attraction.
-
B.
Cape Wickham Lighthouse
Cape Wickham Lighthouse is a historic, tall stone lighthouse on King Island in Bass Strait, Australia, known for guiding ships through one of the country's most treacherous maritime passages.
-
C.
Wadjemup Lighthouse
Wadjemup Lighthouse is a historic coastal beacon on Rottnest Island in Western Australia, serving as a key navigational aid for vessels off the Perth coastline.
-
D.
Scarborough Lighthouse
Scarborough Lighthouse is a historic coastal beacon in Scarborough, England, guiding ships along the North Sea and serving as a prominent feature of the town’s harbor.
-
E.
Batticaloa Lighthouse
Batticaloa Lighthouse is a coastal beacon in eastern Sri Lanka that guides maritime navigation and serves as a notable historical and tourist attraction for the city of Batticaloa.
- 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: Raffles Lighthouse Target entity description: Raffles Lighthouse is a historic offshore lighthouse in Singapore that aids maritime navigation at the southern entrance of the Singapore Strait.
-
A.
Hook Lighthouse
Hook Lighthouse is one of the world’s oldest operational lighthouses, located on the Hook Peninsula in County Wexford, Ireland, and is a prominent maritime landmark and tourist attraction.
-
B.
Cape Wickham Lighthouse
Cape Wickham Lighthouse is a historic, tall stone lighthouse on King Island in Bass Strait, Australia, known for guiding ships through one of the country's most treacherous maritime passages.
-
C.
Wadjemup Lighthouse
Wadjemup Lighthouse is a historic coastal beacon on Rottnest Island in Western Australia, serving as a key navigational aid for vessels off the Perth coastline.
-
D.
Scarborough Lighthouse
Scarborough Lighthouse is a historic coastal beacon in Scarborough, England, guiding ships along the North Sea and serving as a prominent feature of the town’s harbor.
-
E.
Batticaloa Lighthouse
Batticaloa Lighthouse is a coastal beacon in eastern Sri Lanka that guides maritime navigation and serves as a notable historical and tourist attraction for the city of Batticaloa.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
lighthouse
ⓘ
maritime navigational aid ⓘ |
| access | by boat only ⓘ |
| architecturalStyle | masonry lighthouse tower ⓘ |
| category |
Buildings and structures in Singapore
ⓘ
Lighthouses in Singapore ⓘ Maritime infrastructure in Singapore ⓘ |
| constructionEndDate | 1855 ⓘ |
| constructionStartDate | 1854 ⓘ |
| country | Singapore ⓘ |
| distanceFrom | about 23 kilometres south of mainland Singapore ⓘ |
| focalHeight | about 31 metres above sea level ⓘ |
| function | warns ships of surrounding reefs and shoals ⓘ |
| hasFacility |
helipad
ⓘ
lighthouse keeper quarters ⓘ |
| hasMarker | daymark tower ⓘ |
| height | about 29 metres ⓘ |
| heritageStatus | historic lighthouse of Singapore ⓘ |
| heritageValue | one of the oldest lighthouses in Singapore ⓘ |
| inception | 1855 ⓘ |
| lightCharacteristic | white flashing light ⓘ |
| lightRange | about 20 nautical miles ⓘ |
| locatedInWaterBody | Singapore Strait ⓘ |
| locatedOn | southernmost island of Singapore territory open to visitors ⓘ |
| location |
Pulau Satumu
ⓘ
southern entrance of the Singapore Strait ⓘ |
| managedBy | Raffles Lighthouse station staff ⓘ |
| materialUsed |
brick
ⓘ
granite ⓘ |
| namedAfter |
Stamford Raffles
ⓘ
linked to:
Thomas Stamford Raffles
|
| navigationSystem | visual navigation ⓘ |
| offers | limited guided tours on special occasions ⓘ |
| offshoreFrom | main island of Singapore ⓘ |
| openToPublic | restricted access ⓘ |
| operator | Maritime and Port Authority of Singapore ⓘ |
| ownedBy | Government of Singapore ⓘ |
| partOf | network of lighthouses in Singapore ⓘ |
| powerSource | electric light ⓘ |
| purpose |
aids maritime navigation
ⓘ
marks southern approaches to Singapore ⓘ |
| region |
South China Sea approaches
ⓘ
linked to:
South China Sea
|
| status | active lighthouse ⓘ |
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: Raffles Lighthouse Description of subject: Raffles Lighthouse is a historic offshore lighthouse in Singapore that aids maritime navigation at the southern entrance of the Singapore Strait.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.