Arroyo Seco
E75440
Arroyo Seco is a seasonal river and canyon in Los Angeles County, California, known for its historic role in regional water management, recreation, and as the route followed by the Arroyo Seco Parkway.
All labels observed (7)
| Label | Occurrences |
|---|---|
| Arroyo Seco canonical | 16 |
| Arroyo Seco stream | 2 |
| Arroyo Seco (Monterey County) | 1 |
| Arroyo Seco canyon | 1 |
| Arroyo Seco stream channel | 1 |
| Arroyo Seco watercourse | 1 |
| Arroyo Seco watershed | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T422220 — 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: Arroyo Seco Context triple: [Pasadena, traversedBy, Arroyo Seco]
-
A.
Los Angeles River
The Los Angeles River is a largely channelized urban waterway running through Los Angeles County that has played a central role in the region’s history, development, and ongoing revitalization efforts.
-
B.
Santa Cruz River
The Santa Cruz River is a significant river in southern Argentina that flows eastward from the Andes through the Patagonian steppe to the Atlantic Ocean.
-
C.
Merced River
The Merced River is a major Sierra Nevada waterway in California renowned for carving Yosemite Valley and providing iconic scenic, recreational, and ecological value within and beyond Yosemite National Park.
-
D.
Chavez Ravine
Chavez Ravine is a hilly area in Los Angeles best known as the site of Dodger Stadium, home of the Los Angeles Dodgers.
-
E.
Mojave River
The Mojave River is an intermittent river in the Mojave Desert of California that mostly flows underground and provides a crucial water source for the region’s arid ecosystems and communities.
- 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: Arroyo Seco Target entity description: Arroyo Seco is a seasonal river and canyon in Los Angeles County, California, known for its historic role in regional water management, recreation, and as the route followed by the Arroyo Seco Parkway.
-
A.
Los Angeles River
The Los Angeles River is a largely channelized urban waterway running through Los Angeles County that has played a central role in the region’s history, development, and ongoing revitalization efforts.
-
B.
Santa Cruz River
The Santa Cruz River is a significant river in southern Argentina that flows eastward from the Andes through the Patagonian steppe to the Atlantic Ocean.
-
C.
Merced River
The Merced River is a major Sierra Nevada waterway in California renowned for carving Yosemite Valley and providing iconic scenic, recreational, and ecological value within and beyond Yosemite National Park.
-
D.
Chavez Ravine
Chavez Ravine is a hilly area in Los Angeles best known as the site of Dodger Stadium, home of the Los Angeles Dodgers.
-
E.
Mojave River
The Mojave River is an intermittent river in the Mojave Desert of California that mostly flows underground and provides a crucial water source for the region’s arid ecosystems and communities.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
canyon
ⓘ
geographical feature ⓘ seasonal river ⓘ |
| associatedWith |
Arroyo Seco Parkway
ⓘ
California State Route 110 ⓘ historic parkway design ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| environmentalIssue |
flooding risk during heavy storms
ⓘ
habitat fragmentation ⓘ urban runoff pollution ⓘ |
| flowsInto | Los Angeles River ⓘ |
| hasPart |
Arroyo Seco canyon
ⓘ
linked to:
Arroyo Seco
Arroyo Seco stream channel ⓘ
linked to:
Arroyo Seco
flood control channels ⓘ parks along its course ⓘ recreational trails ⓘ |
| hasRecreationArea |
Arroyo Seco in Pasadena parklands
ⓘ
trails connecting to the Rose Bowl area ⓘ |
| historicalSignificance |
early water supply development for Los Angeles region
ⓘ
site of early flood control projects ⓘ |
| knownFor |
historic role in regional water management
ⓘ
recreation ⓘ route of the Arroyo Seco Parkway ⓘ |
| languageOfName | Spanish ⓘ |
| locatedIn |
City of Los Angeles
ⓘ
linked to:
Los Angeles
City of Pasadena ⓘ
linked to:
Pasadena
Los Angeles County, California ⓘ
linked to:
Los Angeles County
San Gabriel Valley ⓘ Southern California ⓘ |
| mouthLocation |
confluence with the Los Angeles River
ⓘ
near Elysian Park, Los Angeles ⓘ |
| nameMeaning | “dry stream” or “dry creek” in Spanish ⓘ |
| near |
Old Town Pasadena
ⓘ
linked to:
Old Pasadena
Rose Bowl Stadium ⓘ
linked to:
Rose Bowl Stadium (home football venue)
|
| partOf |
Greater Los Angeles hydrologic system
ⓘ
Los Angeles River watershed ⓘ
linked to:
Los Angeles River
|
| passesThrough |
Highland Park
ⓘ
Northeast Los Angeles neighborhoods ⓘ
linked to:
Eagle Rock neighborhood
Pasadena ⓘ South Pasadena ⓘ
linked to:
South Pasadena, California
|
| sourceLocation |
Angeles National Forest
ⓘ
San Gabriel Mountains ⓘ |
| usedFor |
biking
ⓘ
equestrian activities ⓘ groundwater recharge ⓘ hiking ⓘ stormwater conveyance ⓘ urban 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: Arroyo Seco Description of subject: Arroyo Seco is a seasonal river and canyon in Los Angeles County, California, known for its historic role in regional water management, recreation, and as the route followed by the Arroyo Seco Parkway.
Referenced by (23)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Arroyo Seco
linked to: Arroyo Seco
linked to: Arroyo Seco
linked to: Arroyo Seco
linked to: Arroyo Seco
linked to: Arroyo Seco
linked to: Arroyo Seco