Port Tobacco River
E89964
Port Tobacco River is a tidal tributary of the Potomac River in southern Maryland known for its historical significance to the former colonial port town of Port Tobacco.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Port Tobacco River canonical | 6 |
How this entity was disambiguated
This entity first appeared as the object of triple T749595 — 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: Port Tobacco River Context triple: [Charles County, Maryland, adjacentToWaterBody, Port Tobacco River]
-
A.
Port Morant
Port Morant is a coastal town in eastern Jamaica known historically as one of the island’s early ports and plantation centers.
-
B.
Reedy Creek
Reedy Creek is a natural waterway in central Florida that runs through the area encompassing the Walt Disney World Resort.
-
C.
Darlington Point
Darlington Point is a small rural town in the Riverina region of New South Wales, Australia, situated on the banks of the Murrumbidgee River and known for its agricultural surroundings.
-
D.
Rock Harbor
Rock Harbor is a small lakeside settlement and primary visitor hub on Isle Royale in Lake Superior, offering lodging, marina services, and access to hiking and boating in Isle Royale National Park.
-
E.
Weston Point
Weston Point is a suburban area of the industrial town of Runcorn in Cheshire, England, known for its proximity to the Manchester Ship Canal and local chemical industry.
- 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: Port Tobacco River Target entity description: Port Tobacco River is a tidal tributary of the Potomac River in southern Maryland known for its historical significance to the former colonial port town of Port Tobacco.
-
A.
Port Morant
Port Morant is a coastal town in eastern Jamaica known historically as one of the island’s early ports and plantation centers.
-
B.
Reedy Creek
Reedy Creek is a natural waterway in central Florida that runs through the area encompassing the Walt Disney World Resort.
-
C.
Darlington Point
Darlington Point is a small rural town in the Riverina region of New South Wales, Australia, situated on the banks of the Murrumbidgee River and known for its agricultural surroundings.
-
D.
Rock Harbor
Rock Harbor is a small lakeside settlement and primary visitor hub on Isle Royale in Lake Superior, offering lodging, marina services, and access to hiking and boating in Isle Royale National Park.
-
E.
Weston Point
Weston Point is a suburban area of the industrial town of Runcorn in Cheshire, England, known for its proximity to the Manchester Ship Canal and local chemical industry.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
river in Maryland
ⓘ
tidal river ⓘ tributary ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| country |
United States of America
ⓘ
surface form:
United States
|
| drainageBasinLocatedIn | Charles County, Maryland ⓘ |
| flowsNear |
Port Tobacco Village, Maryland
ⓘ
surface form:
Port Tobacco, Maryland
|
| flowsThrough | Charles County, Maryland ⓘ |
| governingJurisdiction |
Charles County government
ⓘ
Maryland ⓘ
surface form:
State of Maryland
|
| hasConservationOrganization | Port Tobacco River Conservancy ⓘ |
| hasEcosystemType |
brackish water ecosystem
ⓘ
tidal freshwater ecosystem ⓘ |
| hasEnvironmentalConcern |
nutrient pollution
ⓘ
sedimentation ⓘ water quality degradation ⓘ |
| hasMouthElevation | 0 feet ⓘ |
| hasNearbyCommunity | Port Tobacco Village, Maryland ⓘ |
| hasNearbyHistoricSite |
Port Tobacco Historic District
ⓘ
former Charles County seat at Port Tobacco ⓘ |
| hasNearbyLandUse |
agricultural land
ⓘ
forested land ⓘ suburban development ⓘ |
| hasRecreationAccess |
kayak and canoe launches
ⓘ
public boat ramps ⓘ |
| hasWaterbodyType | estuarine river ⓘ |
| hasWildlife |
fish species of the Potomac River estuary
ⓘ
waterfowl ⓘ wetland species ⓘ |
| historicallyAssociatedWith |
Port Tobacco Village, Maryland
ⓘ
surface form:
Port Tobacco, Maryland
colonial port town of Port Tobacco ⓘ |
| historicallyUsedFor |
colonial trade
ⓘ
shipping ⓘ tobacco transport ⓘ |
| isPartOf | Mid-Atlantic coastal plain rivers ⓘ |
| isTidal | true ⓘ |
| locatedIn |
Charles County, Maryland
ⓘ
Maryland ⓘ |
| locatedInRegion | Southern Maryland ⓘ |
| mouthLocatedIn | Potomac River ⓘ |
| namedAfter |
Port Tobacco Village, Maryland
ⓘ
surface form:
Port Tobacco, Maryland
|
| partOf |
Chesapeake Bay region
ⓘ
surface form:
Chesapeake Bay watershed
Potomac River ⓘ
surface form:
Potomac River watershed
|
| tributaryOf | Potomac River ⓘ |
| usedFor |
boating
ⓘ
fishing ⓘ recreation ⓘ |
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: Port Tobacco River Description of subject: Port Tobacco River is a tidal tributary of the Potomac River in southern Maryland known for its historical significance to the former colonial port town of Port Tobacco.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.