Plymouth Line
E755572
The Plymouth Line is a commuter rail route in Massachusetts that connects Boston with the town of Plymouth as part of the MBTA’s Old Colony Lines network.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Plymouth Line canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T8758754 — 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: Plymouth Line Context triple: [Old Colony Lines, hasLine, Plymouth Line]
-
A.
Bristol–Bath line
The Bristol–Bath line is a key railway route in southwest England that connects the cities of Bristol and Bath, forming part of the Great Western Main Line network.
-
B.
Southampton–Bournemouth line
The Southampton–Bournemouth line is a key railway route on England’s south coast linking the cities of Southampton and Bournemouth and forming part of the wider South West Main Line network.
-
C.
East Coastway Line
The East Coastway Line is a major railway route in East Sussex, England, running along the south coast and connecting Brighton and Lewes with coastal towns such as Eastbourne and Hastings.
-
D.
Southampton–Portsmouth line
The Southampton–Portsmouth line is a key railway route on England’s south coast linking the cities of Southampton and Portsmouth and serving numerous intermediate suburban and coastal communities.
-
E.
Brighton to Portsmouth line
The Brighton to Portsmouth line is a coastal railway route in southern England linking the city of Brighton with Portsmouth via several intermediate towns and stations.
- 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: Plymouth Line Target entity description: The Plymouth Line is a commuter rail route in Massachusetts that connects Boston with the town of Plymouth as part of the MBTA’s Old Colony Lines network.
-
A.
Bristol–Bath line
The Bristol–Bath line is a key railway route in southwest England that connects the cities of Bristol and Bath, forming part of the Great Western Main Line network.
-
B.
Southampton–Bournemouth line
The Southampton–Bournemouth line is a key railway route on England’s south coast linking the cities of Southampton and Bournemouth and forming part of the wider South West Main Line network.
-
C.
East Coastway Line
The East Coastway Line is a major railway route in East Sussex, England, running along the south coast and connecting Brighton and Lewes with coastal towns such as Eastbourne and Hastings.
-
D.
Southampton–Portsmouth line
The Southampton–Portsmouth line is a key railway route on England’s south coast linking the cities of Southampton and Portsmouth and serving numerous intermediate suburban and coastal communities.
-
E.
Brighton to Portsmouth line
The Brighton to Portsmouth line is a coastal railway route in southern England linking the city of Brighton with Portsmouth via several intermediate towns and stations.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
MBTA commuter rail line
ⓘ
commuter rail line ⓘ |
| category |
MBTA Commuter Rail lines
ⓘ
linked to:
MBTA Commuter Rail network
Rail transport in Massachusetts ⓘ |
| connects |
Boston
ⓘ
Plymouth, Massachusetts ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| electrification | none ⓘ |
| endPoint |
Plymouth station
ⓘ
linked to:
Plymouth railway station
|
| locatedIn | Massachusetts ⓘ |
| operator |
MBTA Commuter Rail
ⓘ
linked to:
MBTA Commuter Rail network
Massachusetts Bay Transportation Authority ⓘ
linked to:
MBTA
|
| owner |
Massachusetts Bay Transportation Authority
ⓘ
linked to:
MBTA
|
| partOf |
Old Colony Lines
ⓘ
Old Colony Lines restoration project ⓘ |
| partOfNetwork | MBTA Commuter Rail network ⓘ |
| primaryHub | South Station ⓘ |
| railGauge | standard gauge ⓘ |
| railwaySystem | Old Colony Lines ⓘ |
| regionServed |
Greater Boston
ⓘ
South Shore of Massachusetts ⓘ
linked to:
South Shore
|
| serves |
Boston
ⓘ
Plymouth, Massachusetts ⓘ |
| serviceType | commuter rail ⓘ |
| startPoint | South Station ⓘ |
| terminus |
Plymouth station
ⓘ
linked to:
Plymouth railway station
South Station ⓘ
linked to:
MBTA South Station
|
| trackConfiguration |
double track sections
ⓘ
single track sections ⓘ |
| usesRollingStock | diesel locomotive-hauled coaches ⓘ |
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: Plymouth Line Description of subject: The Plymouth Line is a commuter rail route in Massachusetts that connects Boston with the town of Plymouth as part of the MBTA’s Old Colony Lines network.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.