Old Main Line Trail
E537421
Old Main Line Trail is a recreational hiking and biking path in Maryland that follows the historic route of one of the nation’s earliest railroad lines through Patapsco Valley.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Old Main Line Trail canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5646028 — 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: Old Main Line Trail Context triple: [Patapsco Valley State Park, hasPart, Old Main Line Trail]
-
A.
Lawrence Hopewell Trail
The Lawrence Hopewell Trail is a multi-use recreational path in Mercer County, New Jersey, that offers walking, running, and cycling routes through local parks, neighborhoods, and natural areas.
-
B.
Battle Road Trail
Battle Road Trail is a historic walking and biking path that follows the route of the opening battles of the American Revolutionary War between Lexington and Concord in Massachusetts.
-
C.
Lover's Lane Trail
Lover's Lane Trail is a scenic hiking path in Washington's Olympic National Park that winds through lush temperate rainforest and along the Sol Duc River to Sol Duc Falls.
-
D.
South County Trailway
The South County Trailway is a paved multi-use rail trail in Westchester County, New York, popular for cycling, running, and walking along a former railroad corridor.
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E.
Elizabeth Pass Trail
Elizabeth Pass Trail is a high-elevation hiking route in California’s Sierra Nevada that crosses the rugged Great Western Divide, offering access to remote alpine scenery in Sequoia National Park.
- 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: Old Main Line Trail Target entity description: Old Main Line Trail is a recreational hiking and biking path in Maryland that follows the historic route of one of the nation’s earliest railroad lines through Patapsco Valley.
-
A.
Lawrence Hopewell Trail
The Lawrence Hopewell Trail is a multi-use recreational path in Mercer County, New Jersey, that offers walking, running, and cycling routes through local parks, neighborhoods, and natural areas.
-
B.
Battle Road Trail
Battle Road Trail is a historic walking and biking path that follows the route of the opening battles of the American Revolutionary War between Lexington and Concord in Massachusetts.
-
C.
Lover's Lane Trail
Lover's Lane Trail is a scenic hiking path in Washington's Olympic National Park that winds through lush temperate rainforest and along the Sol Duc River to Sol Duc Falls.
-
D.
South County Trailway
The South County Trailway is a paved multi-use rail trail in Westchester County, New York, popular for cycling, running, and walking along a former railroad corridor.
-
E.
Elizabeth Pass Trail
Elizabeth Pass Trail is a high-elevation hiking route in California’s Sierra Nevada that crosses the rugged Great Western Divide, offering access to remote alpine scenery in Sequoia National Park.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf | recreational trail ⓘ |
| category |
Hiking trails in Maryland
ⓘ
Protected areas of Maryland ⓘ Rail trails in Maryland ⓘ |
| follows |
Old Main Line of the Baltimore and Ohio Railroad
ⓘ
historic railroad route ⓘ |
| hasFeature |
historic railroad remnants
ⓘ
old railbeds ⓘ railroad grades ⓘ scenic views of Patapsco River ⓘ |
| hasHistoricalSignificance |
associated with early Baltimore and Ohio Railroad history
ⓘ
follows one of the earliest railroad lines in the United States ⓘ |
| hasSurface |
dirt
ⓘ
gravel ⓘ natural surface ⓘ |
| hasTerrain |
river valley
ⓘ
wooded areas ⓘ |
| locatedIn |
Maryland
ⓘ
Patapsco Valley ⓘ
linked to:
Patapsco Valley State Park
United States ⓘ
linked to:
United States of America
|
| managedBy | Maryland Department of Natural Resources ⓘ |
| openTo |
cyclists
ⓘ
pedestrians ⓘ |
| partOf |
Patapsco Valley State Park trail system
ⓘ
linked to:
Patapsco Valley State Park
|
| usedFor |
biking
ⓘ
hiking ⓘ nature observation ⓘ walking ⓘ |
| withinProtectedArea | Patapsco Valley State Park ⓘ |
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: Old Main Line Trail Description of subject: Old Main Line Trail is a recreational hiking and biking path in Maryland that follows the historic route of one of the nation’s earliest railroad lines through Patapsco Valley.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.