Dual Contracts
E126196
Dual Contracts were a series of early 20th-century agreements between New York City and private transit companies that financed and expanded the city’s subway system into a modern, extensive network.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Dual Contracts canonical | 7 |
| BMT Dual Contracts | 1 |
| Contract 3 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1092188 — 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: Dual Contracts Context triple: [Eastern Parkway Line, openedAsPartOf, Dual Contracts]
-
A.
Tri-Party Agreement
The Tri-Party Agreement is a legally binding cleanup and compliance pact among the U.S. Department of Energy, the Environmental Protection Agency, and the State of Washington that sets milestones and responsibilities for remediating the Hanford nuclear site.
-
B.
Hard Contract
"Hard Contract" is a 1969 Cold War-era spy thriller film starring Sterling Hayden and James Coburn, centered on a contract killer assigned a final series of assassinations.
-
C.
Operation Agreement
Operation Agreement was a World War II British commando raid in September 1942 targeting Axis positions around Tobruk in North Africa.
-
D.
Mutual
Mutual was a major American radio network that broadcast many prominent sports events and entertainment programs during the mid-20th century.
-
E.
Contract Clause
The Contract Clause is a provision in the U.S. Constitution that restricts states from passing laws that impair the obligation of existing contracts.
- 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: Dual Contracts Target entity description: Dual Contracts were a series of early 20th-century agreements between New York City and private transit companies that financed and expanded the city’s subway system into a modern, extensive network.
-
A.
Tri-Party Agreement
The Tri-Party Agreement is a legally binding cleanup and compliance pact among the U.S. Department of Energy, the Environmental Protection Agency, and the State of Washington that sets milestones and responsibilities for remediating the Hanford nuclear site.
-
B.
Hard Contract
"Hard Contract" is a 1969 Cold War-era spy thriller film starring Sterling Hayden and James Coburn, centered on a contract killer assigned a final series of assassinations.
-
C.
Operation Agreement
Operation Agreement was a World War II British commando raid in September 1942 targeting Axis positions around Tobruk in North Africa.
-
D.
Mutual
Mutual was a major American radio network that broadcast many prominent sports events and entertainment programs during the mid-20th century.
-
E.
Contract Clause
The Contract Clause is a provision in the U.S. Constitution that restricts states from passing laws that impair the obligation of existing contracts.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
New York City Subway expansion program
ⓘ
historical infrastructure contract ⓘ public transit agreement ⓘ |
| alsoKnownAs |
Dual Subway Contracts
ⓘ
Dual System of Rapid Transit ⓘ |
| appliesToJurisdiction |
New York City
ⓘ
New York State ⓘ
linked to:
New York
|
| appliesToPart |
Bronx
ⓘ
linked to:
The Bronx
Brooklyn ⓘ Brooklyn Rapid Transit system ⓘ
linked to:
Brooklyn Rapid Transit Company
Interborough Rapid Transit system ⓘ
linked to:
Interborough Rapid Transit Company
Manhattan ⓘ Queens ⓘ |
| appliesToTransportationSystem |
Brooklyn Rapid Transit Company lines
ⓘ
linked to:
Brooklyn Rapid Transit Company
Interborough Rapid Transit Company lines ⓘ |
| author | Public Service Commission for the First District ⓘ |
| contractingParty |
Brooklyn Rapid Transit Company
ⓘ
City of New York ⓘ
linked to:
New York City
Interborough Rapid Transit Company ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| determines |
construction responsibilities of city and private companies
ⓘ
operating responsibilities of private companies ⓘ |
| endTime | 1940 ⓘ |
| follows | original IRT subway contract of 1904 ⓘ |
| hasEffect |
creation of four-track trunk lines in Manhattan
ⓘ
extension of subway service into outer boroughs ⓘ long-term leasing of city-built lines to private operators ⓘ major increase in subway mileage ⓘ standardization of subway construction and operation terms ⓘ |
| hasPart |
Contract 3
ⓘ
linked to:
Dual Contracts
Contract 4 ⓘ |
| historicalPeriod | Progressive Era ⓘ |
| inception | Dual System era of New York City rapid transit ⓘ |
| languageOfWorkOrName | English ⓘ |
| location | New York City ⓘ |
| mainSubject | New York City Subway ⓘ |
| pointInTime | early 20th century ⓘ |
| purpose |
create a unified citywide subway network
ⓘ
expand rapid transit service ⓘ finance subway construction ⓘ |
| regulates |
fares on participating subway lines
ⓘ
revenue sharing between city and private companies ⓘ |
| replacedBy |
city-owned unified subway system
ⓘ
later operations of the New York City Transit Authority ⓘ operations of the Board of Transportation ⓘ |
| significantEvent | expansion of New York City rapid transit network ⓘ |
| significantImpact |
facilitated urban growth in outer boroughs
ⓘ
shaped long-term layout of New York City Subway ⓘ |
| signingDate | 1913-03-19 ⓘ |
| startTime | 1913 ⓘ |
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: Dual Contracts Description of subject: Dual Contracts were a series of early 20th-century agreements between New York City and private transit companies that financed and expanded the city’s subway system into a modern, extensive network.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Dual Contracts
linked to: Dual Contracts