CSX Chicago–Boston main line
E873982
The CSX Chicago–Boston main line is a major transcontinental freight rail corridor in the United States that connects Chicago, Illinois, with Boston, Massachusetts, forming a key part of CSX Transportation’s east–west network.
All labels observed (2)
| Label | Occurrences |
|---|---|
| CSX Chicago–Boston main line canonical | 1 |
| CSX east–west mainline through the Alleghenies | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10614760 — 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 Chicago–Boston main line Context triple: [Mohawk Subdivision, formsPartOf, CSX Chicago–Boston main line]
-
A.
New York–Chicago main line
The New York–Chicago main line was a principal intercity rail corridor in the United States that connected the East Coast metropolis of New York City with the Midwestern hub of Chicago.
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B.
Boston–Portland main line
The Boston–Portland main line is a historic New England railroad corridor connecting Boston, Massachusetts, with Portland, Maine, that has long served as a key passenger and freight route along the region’s coast.
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C.
CSX railroad line
The CSX railroad line is a freight rail route operated by CSX Transportation that serves as a key corridor for moving goods through Columbiana, Alabama and the surrounding region.
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D.
Ou Main Line
The Ōu Main Line is a major Japanese railway route in the Tōhoku region that runs roughly north–south through Honshu, connecting key cities including Aomori.
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E.
Providence/Stoughton Line
The Providence/Stoughton Line is a Massachusetts Bay Transportation Authority commuter rail route connecting Boston with Providence, Rhode Island and Stoughton, 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: CSX Chicago–Boston main line Target entity description: The CSX Chicago–Boston main line is a major transcontinental freight rail corridor in the United States that connects Chicago, Illinois, with Boston, Massachusetts, forming a key part of CSX Transportation’s east–west network.
-
A.
New York–Chicago main line
The New York–Chicago main line was a principal intercity rail corridor in the United States that connected the East Coast metropolis of New York City with the Midwestern hub of Chicago.
-
B.
Boston–Portland main line
The Boston–Portland main line is a historic New England railroad corridor connecting Boston, Massachusetts, with Portland, Maine, that has long served as a key passenger and freight route along the region’s coast.
-
C.
CSX railroad line
The CSX railroad line is a freight rail route operated by CSX Transportation that serves as a key corridor for moving goods through Columbiana, Alabama and the surrounding region.
-
D.
Ou Main Line
The Ōu Main Line is a major Japanese railway route in the Tōhoku region that runs roughly north–south through Honshu, connecting key cities including Aomori.
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E.
Providence/Stoughton Line
The Providence/Stoughton Line is a Massachusetts Bay Transportation Authority commuter rail route connecting Boston with Providence, Rhode Island and Stoughton, Massachusetts.
- F. None of above. chosen
Statements (15)
| Predicate | Object |
|---|---|
| instanceOf |
freight rail corridor
ⓘ
railway line ⓘ |
| connects |
Boston, Massachusetts
NERFINISHED
ⓘ
Chicago, Illinois NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| networkRole | key east–west corridor for CSX Transportation ⓘ |
| operator | CSX Transportation NERFINISHED ⓘ |
| owner | CSX Transportation NERFINISHED ⓘ |
| partOf | CSX Transportation east–west network NERFINISHED ⓘ |
| railGauge | standard gauge ⓘ |
| significance | major transcontinental freight route ⓘ |
| terminus |
Boston, Massachusetts
NERFINISHED
ⓘ
Chicago, Illinois NERFINISHED ⓘ |
| trackType | heavy rail ⓘ |
| use | freight transportation ⓘ |
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 Chicago–Boston main line Description of subject: The CSX Chicago–Boston main line is a major transcontinental freight rail corridor in the United States that connects Chicago, Illinois, with Boston, Massachusetts, forming a key part of CSX Transportation’s east–west network.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
CSX east–west mainline through the Alleghenies