East Branch Tunnel
E819583
East Branch Tunnel is a major underground conduit within New York’s Delaware Aqueduct system that transports drinking water from upstate reservoirs toward New York City.
All labels observed (1)
| Label | Occurrences |
|---|---|
| East Branch Tunnel canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9739079 — 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: East Branch Tunnel Context triple: [Delaware Aqueduct, hasPart, East Branch Tunnel]
-
A.
West Branch Tunnel
West Branch Tunnel is a major underground conduit within New York’s Delaware Aqueduct system that transports drinking water from upstate reservoirs toward New York City.
-
B.
Sumner Tunnel
The Sumner Tunnel is a major vehicular tunnel in Boston that carries traffic under Boston Harbor between East Boston and downtown.
-
C.
Adams Tunnel
Adams Tunnel is a major transmountain water diversion tunnel in Colorado that conveys Colorado River water beneath the Continental Divide to the eastern slope as part of a large federal water project.
-
D.
Clyde Tunnel
The Clyde Tunnel is a road tunnel in Glasgow, Scotland, carrying vehicular traffic beneath the River Clyde to connect the city’s north and south banks.
-
E.
Summit Tunnel
Summit Tunnel is a historic railroad tunnel driven through the Sierra Nevada in California, notable for its challenging 19th-century construction as part of the First Transcontinental Railroad.
- 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: East Branch Tunnel Target entity description: East Branch Tunnel is a major underground conduit within New York’s Delaware Aqueduct system that transports drinking water from upstate reservoirs toward New York City.
-
A.
West Branch Tunnel
West Branch Tunnel is a major underground conduit within New York’s Delaware Aqueduct system that transports drinking water from upstate reservoirs toward New York City.
-
B.
Sumner Tunnel
The Sumner Tunnel is a major vehicular tunnel in Boston that carries traffic under Boston Harbor between East Boston and downtown.
-
C.
Adams Tunnel
Adams Tunnel is a major transmountain water diversion tunnel in Colorado that conveys Colorado River water beneath the Continental Divide to the eastern slope as part of a large federal water project.
-
D.
Clyde Tunnel
The Clyde Tunnel is a road tunnel in Glasgow, Scotland, carrying vehicular traffic beneath the River Clyde to connect the city’s north and south banks.
-
E.
Summit Tunnel
Summit Tunnel is a historic railroad tunnel driven through the Sierra Nevada in California, notable for its challenging 19th-century construction as part of the First Transcontinental Railroad.
- F. None of above. chosen
Statements (26)
| Predicate | Object |
|---|---|
| instanceOf |
underground conduit
ⓘ
water supply tunnel ⓘ |
| category | Water tunnels in New York State ⓘ |
| connectsTo | upstate New York reservoirs ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| engineeringStructure | pressure tunnel ⓘ |
| feeds | New York City distribution system ⓘ |
| function | transport drinking water toward New York City ⓘ |
| infrastructureType | municipal water infrastructure ⓘ |
| isPartOf |
New York City Delaware Aqueduct system
ⓘ
linked to:
Delaware Aqueduct
|
| locatedIn | New York State ⓘ |
| medium | freshwater ⓘ |
| operator | New York City Department of Environmental Protection ⓘ |
| ownedBy |
City of New York
ⓘ
linked to:
New York City
|
| partOf |
Delaware Aqueduct
ⓘ
New York City water tunnel network ⓘ
linked to:
New York City water tunnels
|
| purpose | bulk water transmission ⓘ |
| regionServed | downstate New York ⓘ |
| role | major component of Delaware Aqueduct ⓘ |
| serves |
New York City metropolitan area
ⓘ
linked to:
New York metropolitan area
|
| subterranean | true ⓘ |
| system | New York City water supply system ⓘ |
| transportsTo | New York City ⓘ |
| use | drinking water conveyance ⓘ |
| waterSource | Delaware system reservoirs ⓘ |
| waterType | potable water ⓘ |
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: East Branch Tunnel Description of subject: East Branch Tunnel is a major underground conduit within New York’s Delaware Aqueduct system that transports drinking water from upstate reservoirs toward New York City.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.