Ocheyedan River
E762685
The Ocheyedan River is a tributary waterway in northwestern Iowa that flows through agricultural landscapes before joining the Little Sioux River.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ocheyedan River canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5250380 — 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: Ocheyedan River Context triple: [Little Sioux River, hasRightTributary, Ocheyedan River]
-
A.
Basaseachic River
The Basaseachic River is a waterway in the Sierra Madre Occidental of Chihuahua, Mexico, known for forming the spectacular Basaseachic Falls, one of the country’s highest waterfalls.
-
B.
Siang River
The Siang River is a major river in northeastern India that forms the upper course of the Brahmaputra as it flows from Tibet into Arunachal Pradesh.
-
C.
Crooked River
Crooked River is a major tributary of the Deschutes River in central Oregon, known for its deep canyons, scenic recreation areas, and important role in regional irrigation and wildlife habitat.
-
D.
Kahiltna River
Kahiltna River is a river in Alaska that drains the Kahiltna Glacier on the southern flank of Denali and flows through remote wilderness before joining the larger Susitna River system.
-
E.
Magothy River
The Magothy River is a tidal sub-estuary of the Chesapeake Bay in Maryland, known for its recreational boating, waterfront communities, and ecological significance.
- 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: Ocheyedan River Target entity description: The Ocheyedan River is a tributary waterway in northwestern Iowa that flows through agricultural landscapes before joining the Little Sioux River.
-
A.
Basaseachic River
The Basaseachic River is a waterway in the Sierra Madre Occidental of Chihuahua, Mexico, known for forming the spectacular Basaseachic Falls, one of the country’s highest waterfalls.
-
B.
Siang River
The Siang River is a major river in northeastern India that forms the upper course of the Brahmaputra as it flows from Tibet into Arunachal Pradesh.
-
C.
Crooked River
Crooked River is a major tributary of the Deschutes River in central Oregon, known for its deep canyons, scenic recreation areas, and important role in regional irrigation and wildlife habitat.
-
D.
Kahiltna River
Kahiltna River is a river in Alaska that drains the Kahiltna Glacier on the southern flank of Denali and flows through remote wilderness before joining the larger Susitna River system.
-
E.
Magothy River
The Magothy River is a tidal sub-estuary of the Chesapeake Bay in Maryland, known for its recreational boating, waterfront communities, and ecological significance.
- F. None of above. chosen
Statements (38)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| country |
United States of America
ⓘ
surface form:
United States
|
| drainageAreaUse |
corn production
ⓘ
soybean production ⓘ |
| flowsGenerally | southeast ⓘ |
| flowsThrough |
Buena Vista County, Iowa
NERFINISHED
ⓘ
Clay County, Iowa NERFINISHED ⓘ O'Brien County, Iowa NERFINISHED ⓘ Osceola County, Iowa NERFINISHED ⓘ agricultural landscapes ⓘ |
| hasFeature |
channelized segments
ⓘ
riparian wetlands ⓘ |
| hasFloodRisk | seasonal flooding ⓘ |
| hasLandUseInBasin |
livestock farming
ⓘ
row-crop agriculture ⓘ |
| hasMouthElevation | approximately 370 meters ⓘ |
| hasSourceElevation | approximately 480 meters ⓘ |
| hasWatershed | Ocheyedan River watershed ⓘ |
| locatedIn |
Iowa
ⓘ
northwestern Iowa ⓘ |
| monitoredBy |
Iowa Department of Natural Resources
NERFINISHED
ⓘ
U.S. Geological Survey NERFINISHED ⓘ |
| mouthOf | Little Sioux River NERFINISHED ⓘ |
| nearbySettlement |
Ocheyedan, Iowa
NERFINISHED
ⓘ
Spencer, Iowa NERFINISHED ⓘ Sutherland, Iowa NERFINISHED ⓘ |
| partOf |
Mississippi River basin
NERFINISHED
ⓘ
Missouri River watershed NERFINISHED ⓘ |
| region | Midwestern United States ⓘ |
| riverSystem | Little Sioux River basin NERFINISHED ⓘ |
| subjectTo |
nonpoint source pollution
ⓘ
nutrient runoff ⓘ |
| supports |
freshwater fish species
ⓘ
waterfowl habitat ⓘ |
| tributaryOf | Little Sioux River NERFINISHED ⓘ |
| usedFor |
agricultural drainage
ⓘ
irrigation support ⓘ |
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: Ocheyedan River Description of subject: The Ocheyedan River is a tributary waterway in northwestern Iowa that flows through agricultural landscapes before joining the Little Sioux River.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.