CSX Transportation Metropolitan Subdivision
E270847
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.
All labels observed (3)
| Label | Occurrences |
|---|---|
| CSX Metropolitan Subdivision | 2 |
| CSX Transportation Metropolitan Subdivision canonical | 1 |
| Capital Subdivision (CSX Transportation) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2474336 — 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 Metropolitan Subdivision Context triple: [MARC Brunswick Line, usesRailwayLine, CSX Transportation Metropolitan Subdivision]
-
A.
CSX Trenton Subdivision
The CSX Trenton Subdivision is a freight rail line in the northeastern United States operated by CSX Transportation, forming part of a major corridor between Philadelphia and North Jersey.
-
B.
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.
-
C.
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.
-
D.
CSX Transportation
CSX Transportation is a major U.S. freight railroad company operating an extensive rail network across the eastern United States.
-
E.
CSX S-Line
The CSX S-Line is a major freight rail corridor in the CSX Transportation network, running through the southeastern United States and connecting key regional routes and terminals.
- 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 Metropolitan Subdivision Target entity description: 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.
-
A.
CSX Trenton Subdivision
The CSX Trenton Subdivision is a freight rail line in the northeastern United States operated by CSX Transportation, forming part of a major corridor between Philadelphia and North Jersey.
-
B.
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.
-
C.
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.
-
D.
CSX Transportation
CSX Transportation is a major U.S. freight railroad company operating an extensive rail network across the eastern United States.
-
E.
CSX S-Line
The CSX S-Line is a major freight rail corridor in the CSX Transportation network, running through the southeastern United States and connecting key regional routes and terminals.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
rail corridor
ⓘ
railway line ⓘ |
| connectsTo |
CSX Transportation Capital Subdivision
ⓘ
linked to:
CSX Capital Subdivision
CSX Transportation Cumberland Subdivision ⓘ CSX Transportation Old Main Line Subdivision ⓘ
linked to:
CSX Old Main Line Subdivision
|
| country | United States of America ⓘ |
| electrification | not electrified ⓘ |
| formerOwner | Baltimore and Ohio Railroad ⓘ |
| hasLevel | at-grade railway line ⓘ |
| hasRightOfWayUser | Maryland Transit Administration ⓘ |
| hasTraffic |
commuter rail trains
ⓘ
intermodal freight trains ⓘ unit freight trains ⓘ |
| historicalOperator | Baltimore and Ohio Railroad ⓘ |
| locatedIn |
Maryland
ⓘ
Washington, D.C. metropolitan area ⓘ
linked to:
Washington metropolitan area
|
| operator | CSX Transportation ⓘ |
| owner | CSX Transportation ⓘ |
| partOf |
CSX Transportation network
ⓘ
linked to:
CSX Transportation
|
| primaryFunction | through freight corridor ⓘ |
| railGauge | 1,435 mm ⓘ |
| railSystem |
North American freight rail network
ⓘ
linked to:
North American rail network
|
| regionServed |
Montgomery County, Maryland
ⓘ
linked to:
Montgomery County
Washington, D.C. metropolitan area ⓘ
linked to:
Washington metropolitan area
|
| secondaryFunction | commuter rail corridor ⓘ |
| signallingSystem | wayside signals ⓘ |
| trackGauge | standard gauge ⓘ |
| usedBy |
MARC Brunswick Line
ⓘ
MARC Train ⓘ |
| usedFor |
freight rail transport
ⓘ
passenger 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 Metropolitan Subdivision Description of subject: 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.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: CSX Transportation Metropolitan Subdivision
linked to: CSX Transportation Metropolitan Subdivision
Metropolitan Subdivision (CSX Transportation)
→
hasJunctionWith
→
Capital Subdivision (CSX Transportation)
ⓘ
linked to: CSX Transportation Metropolitan Subdivision