CSX mainline system
E712947
The CSX mainline system is a core network of high-capacity freight rail routes that forms the backbone of CSX Transportation’s rail operations across the eastern United States.
All labels observed (4)
| Label | Occurrences |
|---|---|
| CSX rail network | 2 |
| CSX Transportation lines | 1 |
| CSX mainline on the East Coast | 1 |
| CSX mainline system canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8113474 — 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 mainline system Context triple: [CSX S-Line, isMajorComponentOf, CSX mainline system]
-
A.
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.
-
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 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.
-
D.
CSX Capital Subdivision
CSX Capital Subdivision is a CSX Transportation rail line in Maryland that serves as a key freight and commuter corridor between Washington, D.C., and Baltimore.
-
E.
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.
- 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 mainline system Target entity description: The CSX mainline system is a core network of high-capacity freight rail routes that forms the backbone of CSX Transportation’s rail operations across the eastern United States.
-
A.
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.
-
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 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.
-
D.
CSX Capital Subdivision
CSX Capital Subdivision is a CSX Transportation rail line in Maryland that serves as a key freight and commuter corridor between Washington, D.C., and Baltimore.
-
E.
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.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
freight rail infrastructure
ⓘ
railway network ⓘ |
| connectsTo |
classification yards
ⓘ
industrial customers ⓘ intermodal terminals ⓘ major inland terminals in the eastern United States ⓘ major ports on the U.S. East Coast ⓘ regional railroads ⓘ short line railroads ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| electrification | mostly non-electrified ⓘ |
| forms | backbone of CSX Transportation operations ⓘ |
| hasCharacteristic |
core network
ⓘ
dispatch-controlled ⓘ heavy axle-load capable ⓘ high-capacity ⓘ long-distance routes ⓘ multiple subdivisions ⓘ signalized routes ⓘ |
| hasComponent |
CSX mainline subdivisions
ⓘ
dispatching centers ⓘ double-track segments ⓘ sidings ⓘ signal systems ⓘ |
| hasRole | primary long-haul freight corridors for CSX ⓘ |
| hasUse |
agricultural products transportation
ⓘ
automotive freight transportation ⓘ bulk commodity transportation ⓘ chemical products transportation ⓘ coal transportation ⓘ freight transportation ⓘ intermodal freight transportation ⓘ merchandise freight transportation ⓘ |
| isBackboneFor |
CSX Transportation corridor investments
ⓘ
CSX Transportation network capacity planning ⓘ CSX Transportation train scheduling ⓘ |
| locatedIn | eastern United States NERFINISHED ⓘ |
| operator | CSX Transportation NERFINISHED ⓘ |
| ownedBy | CSX Corporation subsidiary CSX Transportation NERFINISHED ⓘ |
| partOf | CSX Transportation rail network NERFINISHED ⓘ |
| railGauge | standard gauge ⓘ |
| regionServed |
Midwest United States
NERFINISHED
ⓘ
Northeast United States NERFINISHED ⓘ Southeast United States NERFINISHED ⓘ |
| supports |
intermodal train operations
ⓘ
manifest train operations ⓘ unit train operations ⓘ |
| trafficType | freight only ⓘ |
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 mainline system Description of subject: The CSX mainline system is a core network of high-capacity freight rail routes that forms the backbone of CSX Transportation’s rail operations across the eastern United States.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
CSX Transportation lines
this entity surface form:
CSX rail network
this entity surface form:
CSX rail network
this entity surface form:
CSX mainline on the East Coast