CSX Transportation Boston Subdivision (historical freight owner)
E899709
CSX Transportation’s Boston Subdivision is a former freight rail corridor in Massachusetts that historically carried CSX freight traffic through the Boston area before portions were repurposed for commuter rail use.
All labels observed (1)
| Label | Occurrences |
|---|---|
| CSX Transportation Boston Subdivision (historical freight owner) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11026698 — 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: CSX Transportation Boston Subdivision (historical freight owner) Context triple: [MBTA Framingham/Worcester Line, usesRailroadCorridor, CSX Transportation Boston Subdivision (historical freight owner)]
-
A.
CSX Transportation Metropolitan Subdivision
The CSX Transportation Metropolitan Subdivision is a major freight and passenger rail corridor in Maryland and the Washington, D.C. area, forming part of CSX's network and hosting MARC commuter rail service.
-
B.
CSX Old Main Line Subdivision
The CSX Old Main Line Subdivision is a historic freight rail line in Maryland that traces much of the original route of the Baltimore and Ohio Railroad, one of the oldest railroads in the United States.
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C.
CSX Bellwood Subdivision
The CSX Bellwood Subdivision is a freight rail line in Virginia operated by CSX Transportation, forming part of the company’s network around the Richmond area.
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D.
CSX Albany Division
The CSX Albany Division is a major operating division of CSX Transportation that oversees freight rail operations across the Albany, New York region and surrounding territories.
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E.
CSX RF&P Subdivision
The CSX RF&P Subdivision is a major CSX Transportation rail line in Virginia that forms part of the busy freight and passenger corridor linking Washington, D.C. with Richmond and points south.
- 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: CSX Transportation Boston Subdivision (historical freight owner) Target entity description: CSX Transportation’s Boston Subdivision is a former freight rail corridor in Massachusetts that historically carried CSX freight traffic through the Boston area before portions were repurposed for commuter rail use.
-
A.
CSX Transportation Metropolitan Subdivision
The CSX Transportation Metropolitan Subdivision is a major freight and passenger rail corridor in Maryland and the Washington, D.C. area, forming part of CSX's network and hosting MARC commuter rail service.
-
B.
CSX Old Main Line Subdivision
The CSX Old Main Line Subdivision is a historic freight rail line in Maryland that traces much of the original route of the Baltimore and Ohio Railroad, one of the oldest railroads in the United States.
-
C.
CSX Bellwood Subdivision
The CSX Bellwood Subdivision is a freight rail line in Virginia operated by CSX Transportation, forming part of the company’s network around the Richmond area.
-
D.
CSX Albany Division
The CSX Albany Division is a major operating division of CSX Transportation that oversees freight rail operations across the Albany, New York region and surrounding territories.
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E.
CSX RF&P Subdivision
The CSX RF&P Subdivision is a major CSX Transportation rail line in Virginia that forms part of the busy freight and passenger corridor linking Washington, D.C. with Richmond and points south.
- F. None of above. chosen
Statements (20)
| Predicate | Object |
|---|---|
| instanceOf |
freight rail corridor
ⓘ
railway line ⓘ |
| connectsTo | other CSX lines in New England ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| gauge | standard gauge ⓘ |
| hasOwner | CSX Transportation NERFINISHED ⓘ |
| hasSectionUse | commuter rail (on repurposed portions) ⓘ |
| historicalOwner | CSX Transportation NERFINISHED ⓘ |
| historicalRole | carried CSX freight traffic through the Boston area ⓘ |
| locatedIn |
Massachusetts
ⓘ
United States of America ⓘ
surface form:
United States
|
| operator | CSX Transportation NERFINISHED ⓘ |
| partOfNetwork | CSX Transportation network NERFINISHED ⓘ |
| railTrafficType | freight ⓘ |
| railwaySystem | North American freight rail system ⓘ |
| regionServed | eastern Massachusetts NERFINISHED ⓘ |
| serves | Boston metropolitan area NERFINISHED ⓘ |
| status | partially repurposed for commuter rail use ⓘ |
| trackType | heavy rail ⓘ |
| usedFor | freight rail transport ⓘ |
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: CSX Transportation Boston Subdivision (historical freight owner) Description of subject: CSX Transportation’s Boston Subdivision is a former freight rail corridor in Massachusetts that historically carried CSX freight traffic through the Boston area before portions were repurposed for commuter rail use.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
MBTA Framingham/Worcester Line
→
usesRailroadCorridor
→
CSX Transportation Boston Subdivision (historical freight owner)
ⓘ