Boston and Maine Railroad main line
E675555
The Boston and Maine Railroad main line was a major New England rail corridor that formed the core route of the Boston and Maine Railroad, connecting Boston with key cities and towns across northern Massachusetts and beyond.
All labels observed (4)
How this entity was disambiguated
This entity first appeared as the object of triple T7565440 — 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: Boston and Maine Railroad main line Context triple: [Fitchburg Line, historicalPredecessor, Boston and Maine Railroad main line]
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A.
Boston–Portland main line
The Boston–Portland main line is a historic New England railroad corridor connecting Boston, Massachusetts, with Portland, Maine, that has long served as a key passenger and freight route along the region’s coast.
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B.
Boston–Maine rail network
The Boston–Maine rail network was a regional railroad system in New England that connected major cities and towns, notably linking Boston with communities throughout Maine and neighboring states.
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C.
Boston–Concord main line
The Boston–Concord main line was a principal intercity rail corridor in New England that connected Boston, Massachusetts with Concord, New Hampshire, serving as a key route for the Boston and Maine Railroad.
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D.
Fitchburg Line
The Fitchburg Line is a commuter rail service operated by the Massachusetts Bay Transportation Authority (MBTA) that runs between Boston and the city of Fitchburg in Massachusetts.
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E.
Boston and Maine Railroad branch line
The Boston and Maine Railroad branch line was a regional rail route in New England that once provided local passenger and freight service through towns such as Sandown, New Hampshire.
- 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: Boston and Maine Railroad main line Target entity description: The Boston and Maine Railroad main line was a major New England rail corridor that formed the core route of the Boston and Maine Railroad, connecting Boston with key cities and towns across northern Massachusetts and beyond.
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A.
Boston–Portland main line
The Boston–Portland main line is a historic New England railroad corridor connecting Boston, Massachusetts, with Portland, Maine, that has long served as a key passenger and freight route along the region’s coast.
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B.
Boston–Maine rail network
The Boston–Maine rail network was a regional railroad system in New England that connected major cities and towns, notably linking Boston with communities throughout Maine and neighboring states.
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C.
Boston–Concord main line
The Boston–Concord main line was a principal intercity rail corridor in New England that connected Boston, Massachusetts with Concord, New Hampshire, serving as a key route for the Boston and Maine Railroad.
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D.
Fitchburg Line
The Fitchburg Line is a commuter rail service operated by the Massachusetts Bay Transportation Authority (MBTA) that runs between Boston and the city of Fitchburg in Massachusetts.
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E.
Boston and Maine Railroad branch line
The Boston and Maine Railroad branch line was a regional rail route in New England that once provided local passenger and freight service through towns such as Sandown, New Hampshire.
- F. None of above. chosen
Statements (28)
| Predicate | Object |
|---|---|
| instanceOf |
rail corridor
ⓘ
railway line ⓘ |
| connects |
Boston
NERFINISHED
ⓘ
key cities in northern Massachusetts ⓘ towns across northern Massachusetts ⓘ |
| connectsTo | northern Massachusetts ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| formsBackboneOf | Boston and Maine Railroad system NERFINISHED ⓘ |
| gauge | standard gauge ⓘ |
| hasRole | core route of the Boston and Maine Railroad ⓘ |
| historicalRegionServed | northern New England ⓘ |
| historicalSignificance | major New England rail corridor ⓘ |
| historicalUse |
intercity rail
ⓘ
regional rail ⓘ |
| locatedIn |
Massachusetts
ⓘ
New England ⓘ |
| namedAfter | Boston and Maine Railroad NERFINISHED ⓘ |
| operator | Boston and Maine Railroad NERFINISHED ⓘ |
| partOf | Boston and Maine Railroad network NERFINISHED ⓘ |
| primaryHub | Boston, Massachusetts NERFINISHED ⓘ |
| servedRegion |
Greater Boston
NERFINISHED
ⓘ
New England transportation network ⓘ northern Massachusetts ⓘ |
| terminus | Boston, Massachusetts NERFINISHED ⓘ |
| trackType | heavy rail ⓘ |
| transportMode | rail ⓘ |
| 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: Boston and Maine Railroad main line Description of subject: The Boston and Maine Railroad main line was a major New England rail corridor that formed the core route of the Boston and Maine Railroad, connecting Boston with key cities and towns across northern Massachusetts and beyond.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Pan Am Railways freight main line (used by Downeaster)
this entity surface form:
Pan Am Railways main line (former Boston and Maine Railroad main line)
this entity surface form:
Boston and Maine Railroad (nearby corridor)