Big Dig
E91982
The Big Dig was a massive and controversial highway and tunnel megaproject in Boston that rerouted traffic underground to replace the city’s elevated Central Artery.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Big Dig canonical | 8 |
| Boston Central Artery/Tunnel Project (Big Dig) consulting | 1 |
| The Big Dig highway project | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T778726 — 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: Big Dig Context triple: [Interstate 93, associatedProject, Big Dig]
-
A.
Downtown Tunnel
The Downtown Tunnel is a major underwater vehicular tunnel in the Hampton Roads region that carries traffic beneath the Elizabeth River between Norfolk and Portsmouth, Virginia.
-
B.
Road Hole
Road Hole is the famously challenging 17th hole at the Old Course at St Andrews, renowned for its blind tee shot over buildings and treacherous road and bunker guarding the green.
-
C.
Miracle Mile
Miracle Mile is a historic, museum-rich commercial and cultural district in Los Angeles known for its Art Deco architecture and role as a major urban thoroughfare.
-
D.
Malinta Tunnel
Malinta Tunnel is a historic underground complex on Corregidor Island in the Philippines that served as a bomb-proof headquarters and hospital for American and Filipino forces during World War II.
-
E.
Echo Bridge
Echo Bridge is a historic 19th-century stone arch aqueduct and pedestrian bridge spanning the Charles River between Newton and Needham, Massachusetts.
- 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: Big Dig Target entity description: The Big Dig was a massive and controversial highway and tunnel megaproject in Boston that rerouted traffic underground to replace the city’s elevated Central Artery.
-
A.
Downtown Tunnel
The Downtown Tunnel is a major underwater vehicular tunnel in the Hampton Roads region that carries traffic beneath the Elizabeth River between Norfolk and Portsmouth, Virginia.
-
B.
Road Hole
Road Hole is the famously challenging 17th hole at the Old Course at St Andrews, renowned for its blind tee shot over buildings and treacherous road and bunker guarding the green.
-
C.
Miracle Mile
Miracle Mile is a historic, museum-rich commercial and cultural district in Los Angeles known for its Art Deco architecture and role as a major urban thoroughfare.
-
D.
Malinta Tunnel
Malinta Tunnel is a historic underground complex on Corregidor Island in the Philippines that served as a bomb-proof headquarters and hospital for American and Filipino forces during World War II.
-
E.
Echo Bridge
Echo Bridge is a historic 19th-century stone arch aqueduct and pedestrian bridge spanning the Charles River between Newton and Needham, Massachusetts.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
highway project
ⓘ
infrastructure project ⓘ megaproject ⓘ tunnel project ⓘ |
| builtBy | joint venture contractors ⓘ |
| ceilingCollapseFatalities | 1 ⓘ |
| cityTransformed | Boston skyline and waterfront access ⓘ |
| connectsTo |
Interstate 90
ⓘ
Logan International Airport ⓘ Massachusetts Turnpike ⓘ |
| constructionStart | 1991 ⓘ |
| controversy |
construction defects
ⓘ
cost overruns ⓘ leaks in tunnels ⓘ political scandals ⓘ safety concerns ⓘ |
| cost | approximately 14.6 billion US dollars ⓘ |
| costIncludingInterest | over 20 billion US dollars ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| created | Rose Kennedy Greenway ⓘ |
| designedBy |
Bechtel
ⓘ
linked to:
Bechtel Corporation
Parsons Brinckerhoff ⓘ |
| environmentalImpact |
creation of new parks and open space
ⓘ
reduction of surface traffic lanes downtown ⓘ |
| fundingSource |
Commonwealth of Massachusetts
ⓘ
linked to:
Massachusetts
federal government of the United States ⓘ
linked to:
United States government
|
| includesStructure |
Fort Point Channel Tunnel
ⓘ
linked to:
East Boston Tunnel
O'Neill Tunnel ⓘ Ted Williams Tunnel ⓘ
linked to:
Ted Williams Tunnel (Boston)
Zakim Bunker Hill Bridge ⓘ
linked to:
Zakim Bridge
|
| locatedIn |
Boston
ⓘ
linked to:
Boston, Massachusetts
Massachusetts ⓘ |
| majorConstructionCompletion | 2004 ⓘ |
| managedBy | Massachusetts Turnpike Authority ⓘ |
| notableIncident | 2006 tunnel ceiling collapse ⓘ |
| officialName | Central Artery/Tunnel Project ⓘ |
| openedToTraffic | 2003 ⓘ |
| plannedBy |
Massachusetts Department of Public Works
ⓘ
linked to:
Massachusetts Department of Transportation
|
| projectCompletion | 2007 ⓘ |
| purpose |
to reconnect Boston neighborhoods separated by the elevated highway
ⓘ
to reduce traffic congestion in downtown Boston ⓘ to replace Boston's elevated Central Artery with an underground highway system ⓘ |
| replaced |
Central Artery
ⓘ
John F. Fitzgerald Expressway ⓘ |
| routeCarried |
Interstate 93
ⓘ
U.S. Route 1 ⓘ |
| trafficEffect |
improved north–south traffic flow through Boston
ⓘ
persistent congestion at some interchanges after completion ⓘ |
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: Big Dig Description of subject: The Big Dig was a massive and controversial highway and tunnel megaproject in Boston that rerouted traffic underground to replace the city’s elevated Central Artery.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.