Metropolitan Subdivision (CSX Transportation)
E670973
Metropolitan Subdivision (CSX Transportation) is a major CSX freight and passenger rail line in Maryland that forms part of the former Baltimore & Ohio Railroad main line between Washington, D.C., and points northwest.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Metropolitan Subdivision (CSX Transportation) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7535141 — 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: Metropolitan Subdivision (CSX Transportation) Context triple: [Rockville station, locatedOnRailway, Metropolitan Subdivision (CSX Transportation)]
-
A.
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.
-
B.
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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C.
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.
-
D.
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.
-
E.
CSX Transportation Cumberland Subdivision
CSX Transportation's Cumberland Subdivision is a major freight rail line running through Maryland and West Virginia that also hosts MARC commuter rail service on the Brunswick Line.
- 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: Metropolitan Subdivision (CSX Transportation) Target entity description: Metropolitan Subdivision (CSX Transportation) is a major CSX freight and passenger rail line in Maryland that forms part of the former Baltimore & Ohio Railroad main line between Washington, D.C., and points northwest.
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
CSX Transportation Cumberland Subdivision
CSX Transportation's Cumberland Subdivision is a major freight rail line running through Maryland and West Virginia that also hosts MARC commuter rail service on the Brunswick Line.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
CSX Transportation line
ⓘ
railway line ⓘ |
| connects |
Washington, D.C.
NERFINISHED
ⓘ
points northwest of Washington, D.C. ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| electrification | not electrified ⓘ |
| formerOwner | Baltimore and Ohio Railroad NERFINISHED ⓘ |
| hasJunctionWith |
Brunswick Subdivision (CSX Transportation)
NERFINISHED
ⓘ
Capital Subdivision (CSX Transportation) NERFINISHED ⓘ |
| hasTrackConfiguration | double track (on significant portions) ⓘ |
| historicalName | part of B&O main line to the West ⓘ |
| historicalOperator | Baltimore and Ohio Railroad NERFINISHED ⓘ |
| locatedIn | Maryland ⓘ |
| operator | CSX Transportation NERFINISHED ⓘ |
| owner | CSX Transportation NERFINISHED ⓘ |
| partOf |
CSX Baltimore Division
NERFINISHED
ⓘ
former Baltimore and Ohio Railroad main line NERFINISHED ⓘ |
| partOfRoute | Washington, D.C.–Cumberland–Pittsburgh corridor (historical B&O) NERFINISHED ⓘ |
| passesThrough |
Frederick County, Maryland
NERFINISHED
ⓘ
Montgomery County, Maryland NERFINISHED ⓘ |
| primaryFunction | freight corridor between Washington, D.C., and western connections ⓘ |
| railGauge | standard gauge ⓘ |
| regionServed |
Washington metropolitan area
ⓘ
western Maryland ⓘ |
| terminus | near Union Station (Washington, D.C.) ⓘ |
| usedBy |
MARC Brunswick Line
NERFINISHED
ⓘ
MARC Train NERFINISHED ⓘ |
| usedFor |
freight rail service
ⓘ
passenger rail service ⓘ |
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: Metropolitan Subdivision (CSX Transportation) Description of subject: Metropolitan Subdivision (CSX Transportation) is a major CSX freight and passenger rail line in Maryland that forms part of the former Baltimore & Ohio Railroad main line between Washington, D.C., and points northwest.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.