MARC Penn Line
E48336
The MARC Penn Line is a Maryland commuter rail service that runs along the Amtrak Northeast Corridor between Washington, D.C., and Perryville, serving numerous communities in Prince George’s County and beyond.
All labels observed (4)
| Label | Occurrences |
|---|---|
| MARC Penn Line canonical | 30 |
| MARC Penn Line (nearby) | 2 |
| MARC Penn Line network | 2 |
| MARC Penn Line (via BWI Rail Station) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T253870 — 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: MARC Penn Line Context triple: [Prince George’s County, Maryland, hasPublicTransit, MARC Penn Line]
-
A.
Pink Line
The Pink Line is a rapid transit route in Chicago's "L" system that runs between the Loop and the city's West Side neighborhoods.
-
B.
Blue Line
The Blue Line is a major rapid transit route in Chicago that runs between O'Hare International Airport and the city's western suburbs via downtown.
-
C.
Blue Line
The Blue Line is one of the color-coded rapid transit routes in the Washington Metro system, running through key parts of Washington, D.C. and its Virginia suburbs.
-
D.
Blue Line
The Blue Line is one of Boston's MBTA rapid transit routes, running primarily between downtown Boston and the coastal communities of East Boston and Revere.
-
E.
Purple Line
The Purple Line is a rapid transit route in Chicago's 'L' system that primarily serves the city's northern suburbs and connects them to the North Side of Chicago.
- 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: MARC Penn Line Target entity description: The MARC Penn Line is a Maryland commuter rail service that runs along the Amtrak Northeast Corridor between Washington, D.C., and Perryville, serving numerous communities in Prince George’s County and beyond.
-
A.
Pink Line
The Pink Line is a rapid transit route in Chicago's "L" system that runs between the Loop and the city's West Side neighborhoods.
-
B.
Blue Line
The Blue Line is one of the color-coded rapid transit routes in the Washington Metro system, running through key parts of Washington, D.C. and its Virginia suburbs.
-
C.
Blue Line
The Blue Line is a major rapid transit route in Chicago that runs between O'Hare International Airport and the city's western suburbs via downtown.
-
D.
Blue Line
The Blue Line is one of Boston's MBTA rapid transit routes, running primarily between downtown Boston and the coastal communities of East Boston and Revere.
-
E.
Purple Line
The Purple Line is a rapid transit route in Chicago's 'L' system that primarily serves the city's northern suburbs and connects them to the North Side of Chicago.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail line
ⓘ
passenger rail service ⓘ |
| connectsWith |
Baltimore Light RailLink at Baltimore Penn Station (via short walk)
ⓘ
Baltimore Metro SubwayLink at Charles Center (via local transit from Baltimore Penn Station) ⓘ
linked to:
Baltimore Metro SubwayLink
Washington Metro at Washington Union Station ⓘ
linked to:
Union Station (Washington Metro)
|
| country |
United States
ⓘ
linked to:
United States of America
|
| electrification | overhead catenary ⓘ |
| electrificationVoltage | 25 kV AC (Northeast Corridor standard sections) ⓘ |
| endPoint | Perryville, Maryland ⓘ |
| fareSystem | MARC Train fare zones ⓘ |
| hasStation |
Aberdeen station
ⓘ
linked to:
Highland station
BWI Airport Rail Station ⓘ
linked to:
BWI Airport station
Baltimore Penn Station ⓘ
linked to:
Pennsylvania Station (Baltimore)
Bowie State station ⓘ Edgewood station ⓘ Halethorpe station ⓘ New Carrollton station ⓘ Odenton station ⓘ Perryville station ⓘ Seabrook station ⓘ |
| lineLength | approximately 77 miles ⓘ |
| locatedIn | Maryland ⓘ |
| operator | Maryland Transit Administration ⓘ |
| owner | Maryland Department of Transportation ⓘ |
| partOf | MARC Train ⓘ |
| primaryRollingStock |
diesel locomotives with bi-level coaches
ⓘ
electric locomotives with bi-level coaches ⓘ |
| primaryUse |
commuter travel between Baltimore and Washington
ⓘ
commuter travel between Perryville area and Washington ⓘ |
| regionServed |
Baltimore metropolitan area
ⓘ
linked to:
Baltimore–Washington metropolitan area
Washington metropolitan area ⓘ |
| servesCity |
Baltimore, Maryland
ⓘ
linked to:
Baltimore
Perryville, Maryland ⓘ Washington, D.C. ⓘ |
| servesCounty |
Anne Arundel County, Maryland
ⓘ
linked to:
Anne Arundel County
Baltimore County, Maryland ⓘ
linked to:
Baltimore County
Prince George’s County, Maryland ⓘ |
| servicePattern |
limited weekend service
ⓘ
weekday peak and off-peak service ⓘ |
| serviceType | commuter rail ⓘ |
| sharesTracksWith |
Amtrak Acela service
ⓘ
linked to:
Amtrak Acela
Amtrak Northeast Regional ⓘ |
| startPoint |
Washington Union Station
ⓘ
linked to:
Union Station
|
| terminus |
Perryville station
ⓘ
Washington Union Station ⓘ
linked to:
Union Station
|
| trackOwner | Amtrak ⓘ |
| usesRailCorridor |
Amtrak Northeast Corridor
ⓘ
linked to:
Northeast Corridor
|
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: MARC Penn Line Description of subject: The MARC Penn Line is a Maryland commuter rail service that runs along the Amtrak Northeast Corridor between Washington, D.C., and Perryville, serving numerous communities in Prince George’s County and beyond.
Referenced by (35)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: MARC Penn Line
linked to: MARC Penn Line
linked to: MARC Penn Line
subject linked to:
MARC Train stations
linked to: MARC Penn Line
linked to: MARC Penn Line