San Marcos River
E514891
The San Marcos River is a spring-fed waterway in central Texas known for its clear, constant-temperature waters, recreational activities, and ecological significance.
All labels observed (1)
| Label | Occurrences |
|---|---|
| San Marcos River canonical | 17 |
How this entity was disambiguated
This entity first appeared as the object of triple T5359579 — 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: San Marcos River Context triple: [Hays County, containsRiver, San Marcos River]
-
A.
San Antonio River
The San Antonio River is a spring-fed waterway in south-central Texas best known for flowing through downtown San Antonio and forming the centerpiece of the city’s famous River Walk.
-
B.
San Antonio River
The San Antonio River is a notable watercourse in Argentina’s Córdoba Province, flowing through popular tourist areas in the Punilla Valley and contributing to the region’s scenic landscapes and recreation.
-
C.
San Antonio River
The San Antonio River is a waterway in California’s Coast Range region that flows through Monterey County and is historically associated with nearby Spanish missions.
-
D.
San Jacinto River
The San Jacinto River is a waterway in Southern California that flows through the Inland Empire region, contributing to local water supply, agriculture, and flood control.
-
E.
San Jacinto River
The San Jacinto River is a waterway in southeastern Texas near Houston, historically notable for its proximity to the site of the decisive 1836 Battle of San Jacinto in the Texas Revolution.
- 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: San Marcos River Target entity description: The San Marcos River is a spring-fed waterway in central Texas known for its clear, constant-temperature waters, recreational activities, and ecological significance.
-
A.
San Antonio River
The San Antonio River is a spring-fed waterway in south-central Texas best known for flowing through downtown San Antonio and forming the centerpiece of the city’s famous River Walk.
-
B.
San Antonio River
The San Antonio River is a notable watercourse in Argentina’s Córdoba Province, flowing through popular tourist areas in the Punilla Valley and contributing to the region’s scenic landscapes and recreation.
-
C.
San Antonio River
The San Antonio River is a waterway in California’s Coast Range region that flows through Monterey County and is historically associated with nearby Spanish missions.
-
D.
San Jacinto River
The San Jacinto River is a waterway in Southern California that flows through the Inland Empire region, contributing to local water supply, agriculture, and flood control.
-
E.
San Jacinto River
The San Jacinto River is a waterway in southeastern Texas near Houston, historically notable for its proximity to the site of the decisive 1836 Battle of San Jacinto in the Texas Revolution.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| climateInfluence | moderated by spring-fed temperature ⓘ |
| contains |
endemic aquatic species
ⓘ
threatened species ⓘ |
| country | United States of America ⓘ |
| flowsThrough |
Guadalupe County, Texas
ⓘ
linked to:
Guadalupe County
Hays County, Texas ⓘ
linked to:
Hays County
San Marcos, Texas ⓘ |
| hasBiodiversity | high aquatic biodiversity ⓘ |
| hasConservationConcern |
endangered species habitat protection
ⓘ
urban development impacts ⓘ water quality protection ⓘ |
| hasEcosystemType | spring-fed aquatic ecosystem ⓘ |
| hasFeature |
high water clarity
ⓘ
relatively stable flow rate ⓘ strong spring flow ⓘ |
| hasProtectedArea |
Aquarena Springs area
ⓘ
Spring Lake ⓘ |
| isPartOf | Edwards Aquifer–fed spring systems ⓘ |
| knownFor |
clear water
ⓘ
constant-temperature water ⓘ ecological significance ⓘ recreational activities ⓘ |
| locatedIn |
Central Texas
ⓘ
linked to:
central Texas
Texas ⓘ |
| mouthOf | Guadalupe River ⓘ |
| near | Texas State University ⓘ |
| partOf |
Guadalupe River basin
ⓘ
linked to:
Guadalupe River Basin
|
| protectedBy |
federal environmental laws
ⓘ
state environmental regulations ⓘ |
| recreationManagement | City of San Marcos ⓘ |
| sourceLocation |
San Marcos Springs
ⓘ
San Marcos, Texas ⓘ |
| supports |
recreational tourism economy
ⓘ
research on aquatic ecology ⓘ |
| usedFor |
canoeing
ⓘ
fishing ⓘ kayaking ⓘ snorkeling ⓘ swimming ⓘ tubing ⓘ |
| waterSourceType |
Edwards Aquifer
ⓘ
artesian springs ⓘ |
| waterTemperatureCharacteristic | constant temperature ⓘ |
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: San Marcos River Description of subject: The San Marcos River is a spring-fed waterway in central Texas known for its clear, constant-temperature waters, recreational activities, and ecological significance.
Referenced by (17)
Full triples — surface form annotated when it differs from this entity's canonical label.