Harvard Bridge
E35008
Harvard Bridge is a long roadway bridge in Boston and Cambridge, Massachusetts, best known for carrying Massachusetts Avenue over the Charles River and for its quirky "smoot" length measurement.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Harvard Bridge canonical | 6 |
| Massachusetts Avenue Bridge | 3 |
| Mass Ave Bridge | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T89930 — 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: Harvard Bridge Context triple: [Charles River, hasBridge, Harvard Bridge]
-
A.
Madison Avenue Bridge
The Madison Avenue Bridge is a historic swing bridge in New York City that carries Madison Avenue traffic between Manhattan and the Bronx.
-
B.
Mystic River Bridge
The Mystic River Bridge, officially known as the Maurice J. Tobin Memorial Bridge, is a major steel cantilever roadway bridge in Boston, Massachusetts, carrying U.S. Route 1 over the Mystic River between Charlestown and Chelsea.
-
C.
Broadway Bridge
The Broadway Bridge is a movable bridge in New York City that carries Broadway and the subway across the Harlem River between Manhattan and the Bronx.
-
D.
Willis Avenue Bridge
The Willis Avenue Bridge is a swing bridge in New York City that carries traffic between Manhattan and the Bronx.
-
E.
Park Avenue Bridge
The Park Avenue Bridge is a vertical-lift railroad bridge in New York City that carries Metro-North Railroad tracks between Manhattan and the Bronx.
- 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: Harvard Bridge Target entity description: Harvard Bridge is a long roadway bridge in Boston and Cambridge, Massachusetts, best known for carrying Massachusetts Avenue over the Charles River and for its quirky "smoot" length measurement.
-
A.
Madison Avenue Bridge
The Madison Avenue Bridge is a historic swing bridge in New York City that carries Madison Avenue traffic between Manhattan and the Bronx.
-
B.
Mystic River Bridge
The Mystic River Bridge, officially known as the Maurice J. Tobin Memorial Bridge, is a major steel cantilever roadway bridge in Boston, Massachusetts, carrying U.S. Route 1 over the Mystic River between Charlestown and Chelsea.
-
C.
Broadway Bridge
The Broadway Bridge is a movable bridge in New York City that carries Broadway and the subway across the Harlem River between Manhattan and the Bronx.
-
D.
Willis Avenue Bridge
The Willis Avenue Bridge is a swing bridge in New York City that carries traffic between Manhattan and the Bronx.
-
E.
Park Avenue Bridge
The Park Avenue Bridge is a vertical-lift railroad bridge in New York City that carries Metro-North Railroad tracks between Manhattan and the Bronx.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
beam bridge
ⓘ
roadway bridge ⓘ steel bridge ⓘ |
| alsoKnownAs |
Mass Ave Bridge
ⓘ
linked to:
Harvard Bridge
Massachusetts Avenue Bridge ⓘ
linked to:
Harvard Bridge
|
| bodyOfWater | Charles River ⓘ |
| carries |
Massachusetts Avenue
ⓘ
linked to:
Massachusetts Avenue (Cambridge)
|
| city |
Boston
ⓘ
linked to:
Boston, Massachusetts
Cambridge ⓘ
linked to:
City of Cambridge
|
| connects |
Back Bay, Boston
ⓘ
linked to:
Back Bay
Cambridge, Massachusetts ⓘ MIT campus ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crosses | Charles River ⓘ |
| crossesBetween | MIT campus and Boston’s Back Bay ⓘ |
| crossesFrom |
Boston
ⓘ
linked to:
Boston, Massachusetts
|
| crossesTo |
Cambridge
ⓘ
linked to:
City of Cambridge
|
| hasCoordinate | 42.354°N 71.090°W ⓘ |
| hasCulturalSignificance |
landmark associated with MIT
ⓘ
site of annual smoot repainting ⓘ |
| hasDeck | roadway deck ⓘ |
| hasDesign | multi-span girder bridge ⓘ |
| hasFeature |
bicycle lanes
ⓘ
sidewalks on both sides ⓘ |
| hasLanes | 4 motor vehicle lanes ⓘ |
| hasLength |
364.4 smoots
ⓘ
approximately 2,164 feet ⓘ approximately 660 meters ⓘ |
| hasLengthUnit | smoot ⓘ |
| hasMeasurementMarkings | smoot marks painted along sidewalk ⓘ |
| hasSidewalk |
east sidewalk
ⓘ
west sidewalk ⓘ |
| hasTraffic |
bicycles
ⓘ
motor vehicles ⓘ pedestrians ⓘ |
| knownFor |
MIT student prank tradition
ⓘ
smoot length measurement ⓘ |
| locatedIn |
Boston, Massachusetts
ⓘ
Cambridge, Massachusetts ⓘ |
| maintainedBy | Massachusetts Department of Transportation ⓘ |
| material |
concrete
ⓘ
steel ⓘ |
| namedAfter | Harvard University ⓘ |
| opened | 1891 ⓘ |
| partOf |
Massachusetts Avenue
ⓘ
linked to:
Massachusetts Avenue (Cambridge)
|
| reconstructed | late 1980s ⓘ |
| region | Greater Boston ⓘ |
| roadType | urban arterial ⓘ |
| state | Massachusetts ⓘ |
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: Harvard Bridge Description of subject: Harvard Bridge is a long roadway bridge in Boston and Cambridge, Massachusetts, best known for carrying Massachusetts Avenue over the Charles River and for its quirky "smoot" length measurement.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Harvard Bridge
subject linked to:
Storrow Drive in Boston, Massachusetts
linked to: Harvard Bridge
linked to: Harvard Bridge
linked to: Harvard Bridge
subject linked to:
Charles River, Boston and Cambridge