Key West Extension
E317567
Key West Extension is the historic segment of the Florida East Coast Railway that extended the line over a series of bridges and viaducts from mainland Florida to Key West.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Key West Extension canonical | 2 |
| Florida East Coast Railway Key West Extension | 1 |
| Key West Extension of the Florida East Coast Railway | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2994418 — 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: Key West Extension Context triple: [Overseas Railroad, alsoKnownAs, Key West Extension]
-
A.
Key West, Florida
Key West, Florida is a tropical island city at the southern tip of the Florida Keys known for its historic architecture, vibrant nightlife, and sunset views over the Gulf of Mexico.
-
B.
Virginia Key
Virginia Key is a barrier island off the coast of Miami, Florida, known for its beaches, historic sites, and recreational areas within Biscayne Bay.
-
C.
Key Largo, Florida
Key Largo, Florida is a popular island community in the upper Florida Keys known for its coral reefs, diving, and marine tourism.
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D.
Downtown Key West
Downtown Key West is the lively historic and commercial heart of Key West, Florida, known for its vibrant nightlife, waterfront attractions, and preserved Conch-style architecture.
-
E.
Key Biscayne
Key Biscayne is a small, affluent island town off the coast of Miami, Florida, known for its beaches, parks, and residential communities.
- 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: Key West Extension Target entity description: Key West Extension is the historic segment of the Florida East Coast Railway that extended the line over a series of bridges and viaducts from mainland Florida to Key West.
-
A.
Key West, Florida
Key West, Florida is a tropical island city at the southern tip of the Florida Keys known for its historic architecture, vibrant nightlife, and sunset views over the Gulf of Mexico.
-
B.
Virginia Key
Virginia Key is a barrier island off the coast of Miami, Florida, known for its beaches, historic sites, and recreational areas within Biscayne Bay.
-
C.
Key Largo, Florida
Key Largo, Florida is a popular island community in the upper Florida Keys known for its coral reefs, diving, and marine tourism.
-
D.
Downtown Key West
Downtown Key West is the lively historic and commercial heart of Key West, Florida, known for its vibrant nightlife, waterfront attractions, and preserved Conch-style architecture.
-
E.
Key Biscayne
Key Biscayne is a small, affluent island town off the coast of Miami, Florida, known for its beaches, parks, and residential communities.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
historic railroad extension
ⓘ
railway line ⓘ |
| alsoKnownAs |
Overseas Extension
ⓘ
Overseas Railroad ⓘ |
| associatedWith |
Florida Keys development
ⓘ
Henry Flagler ⓘ |
| builder |
Florida East Coast Railway (historical)
ⓘ
surface form:
Florida East Coast Railway
|
| builtFor |
Florida East Coast Railway (historical)
ⓘ
surface form:
Florida East Coast Railway
|
| closureCause | damage from 1935 Labor Day hurricane ⓘ |
| connects |
Key West, Florida
ⓘ
surface form:
Key West
Miami metropolitan area ⓘ
surface form:
Miami area
|
| constructionEnd | 1912 ⓘ |
| constructionStart | 1905 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| crosses |
Straits of Florida
ⓘ
more than 40 bridges ⓘ |
| engineeringChallenge | construction over open ocean and shallow reefs ⓘ |
| follows | Florida Keys ⓘ |
| gauge | standard gauge ⓘ |
| heritageStatus | historic engineering landmark ⓘ |
| historicalEra |
Progressive Era
ⓘ
surface form:
Progressive Era United States
|
| inception | early 20th century ⓘ |
| inspiredBy | vision of Henry Flagler ⓘ |
| lengthApprox | about 128 miles ⓘ |
| locatedIn | Florida ⓘ |
| namedAfter |
Key West, Florida
ⓘ
surface form:
Key West
|
| notableStructure |
Old Seven Mile Bridge
ⓘ
surface form:
Seven Mile Bridge (railroad)
|
| opened | 1912 ⓘ |
| openedBy |
Florida East Coast Railway (historical)
ⓘ
surface form:
Florida East Coast Railway
|
| openedDuring | Henry Flagler era of FEC ⓘ |
| operatedBy |
Florida East Coast Railway (historical)
ⓘ
surface form:
Florida East Coast Railway
|
| partiallyConvertedTo | Overseas Highway ⓘ |
| partOf |
Florida East Coast Railway (historical)
ⓘ
surface form:
Florida East Coast Railway
|
| routeThrough |
Big Pine Key
ⓘ
Islamorada ⓘ Key Largo ⓘ Lower Keys ⓘ Marathon ⓘ |
| served |
freight traffic
ⓘ
passenger traffic ⓘ |
| significance | linked mainland Florida to Key West by rail for the first time ⓘ |
| status | closed to railroad traffic ⓘ |
| strategicRole | improved access to Caribbean and Latin American trade routes ⓘ |
| terminus |
Key West, Florida
ⓘ
Florida Peninsula ⓘ
surface form:
mainland Florida
|
| transportMode | rail ⓘ |
| usesStructureType |
bridges
ⓘ
embankments ⓘ viaducts ⓘ |
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: Key West Extension Description of subject: Key West Extension is the historic segment of the Florida East Coast Railway that extended the line over a series of bridges and viaducts from mainland Florida to Key West.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Overseas Railroad
this entity surface form:
Key West Extension of the Florida East Coast Railway
this entity surface form:
Florida East Coast Railway Key West Extension