St. Mary's River
E530488
St. Mary's River is a tidal river in southern Maryland that flows through St. Mary's County into the Potomac River and Chesapeake Bay, supporting local ecosystems and recreation.
All labels observed (2)
| Label | Occurrences |
|---|---|
| St. Mary's River canonical | 1 |
| St. Marys River | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5120462 — 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: St. Mary's River Context triple: [St. Mary's County, Maryland, contains, St. Mary's River]
-
A.
St. Marys River
The St. Marys River is a vital waterway forming part of the U.S.–Canada border, connecting Lake Superior to Lake Huron and hosting major shipping locks at Sault Ste. Marie.
-
B.
St. Marys River
The St. Marys River is a tributary in the Midwestern United States that flows through northeastern Indiana and joins with other rivers at Fort Wayne to form the Maumee River.
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C.
St. Marys River
The St. Marys River is a coastal river in the southeastern United States that forms part of the border between Florida and Georgia before emptying into the Atlantic Ocean.
-
D.
Nottawasaga River
The Nottawasaga River is a waterway in central Ontario, Canada, that flows through communities such as Alliston before emptying into Nottawasaga Bay on Georgian Bay.
-
E.
La Chute River
La Chute River is a short, fast-flowing river in northeastern New York that connects Lake George to Lake Champlain and historically powered mills in the town of Ticonderoga.
- 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: St. Mary's River Target entity description: St. Mary's River is a tidal river in southern Maryland that flows through St. Mary's County into the Potomac River and Chesapeake Bay, supporting local ecosystems and recreation.
-
A.
St. Marys River
The St. Marys River is a vital waterway forming part of the U.S.–Canada border, connecting Lake Superior to Lake Huron and hosting major shipping locks at Sault Ste. Marie.
-
B.
St. Marys River
The St. Marys River is a tributary in the Midwestern United States that flows through northeastern Indiana and joins with other rivers at Fort Wayne to form the Maumee River.
-
C.
St. Marys River
The St. Marys River is a coastal river in the southeastern United States that forms part of the border between Florida and Georgia before emptying into the Atlantic Ocean.
-
D.
Nottawasaga River
The Nottawasaga River is a waterway in central Ontario, Canada, that flows through communities such as Alliston before emptying into Nottawasaga Bay on Georgian Bay.
-
E.
La Chute River
La Chute River is a short, fast-flowing river in northeastern New York that connects Lake George to Lake Champlain and historically powered mills in the town of Ticonderoga.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | tidal river ⓘ |
| connectedTo | Chesapeake Bay via Potomac River ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| county | St. Mary's County NERFINISHED ⓘ |
| flowsInto | Potomac River NERFINISHED ⓘ |
| hasConservationFocus |
habitat conservation
ⓘ
water quality protection ⓘ |
| hasEcosystemType |
riparian forests
ⓘ
submerged aquatic vegetation beds ⓘ tidal marshes ⓘ |
| hasEnvironmentalConcern |
nutrient runoff
ⓘ
sedimentation ⓘ shoreline erosion ⓘ |
| hasLandUseInWatershed |
agricultural land
ⓘ
forested land ⓘ residential development ⓘ |
| hasMonitoringProgram | St. Mary's River Watershed Association monitoring ⓘ |
| hasNearbyHistoricSite | Historic St. Mary's City NERFINISHED ⓘ |
| hasNearbyInstitution | St. Mary's College of Maryland NERFINISHED ⓘ |
| hasRecreationalAccess |
kayak and canoe launches
ⓘ
public boat ramps ⓘ |
| hasSalinityRegime | brackish water ⓘ |
| isPartOf | lower Potomac River estuarine system NERFINISHED ⓘ |
| isTidal | true ⓘ |
| locatedIn |
Southern Maryland
NERFINISHED
ⓘ
St. Mary's County, Maryland NERFINISHED ⓘ |
| mouthLocation |
lower Potomac River
NERFINISHED
ⓘ
near St. George Island, Maryland ⓘ |
| partOf | Chesapeake Bay drainage basin NERFINISHED ⓘ |
| partOfWatershed | Chesapeake Bay watershed NERFINISHED ⓘ |
| region |
Mid-Atlantic states
ⓘ
surface form:
Mid-Atlantic United States
|
| state | Maryland ⓘ |
| supports |
boating
ⓘ
fishing ⓘ kayaking ⓘ local ecosystems ⓘ recreational activities ⓘ wildlife habitat ⓘ |
| supportsSpeciesGroup |
aquatic vegetation
ⓘ
finfish ⓘ shellfish ⓘ waterfowl ⓘ |
| tributaryOf | Potomac River NERFINISHED ⓘ |
| usedFor |
education and research
ⓘ
recreation ⓘ |
| waterBodyType | tidal estuary ⓘ |
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: St. Mary's River Description of subject: St. Mary's River is a tidal river in southern Maryland that flows through St. Mary's County into the Potomac River and Chesapeake Bay, supporting local ecosystems and recreation.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
St. Marys River