West Branch Iowa River
E411779
The West Branch Iowa River is a tributary stream in Iowa that serves as one of the primary headwaters forming the Iowa River.
All labels observed (2)
| Label | Occurrences |
|---|---|
| West Branch Iowa River canonical | 2 |
| Iowa River headwaters network | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3956905 — 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: West Branch Iowa River Context triple: [Iowa River, formedByConfluenceOf, West Branch Iowa River]
-
A.
East Branch Iowa River
The East Branch Iowa River is a tributary stream in Iowa that serves as one of the primary headwaters forming the Iowa River.
-
B.
Iowa River
The Iowa River is a major waterway in the U.S. state of Iowa that flows generally southeastward and ultimately joins the Mississippi River.
-
C.
Des Moines River
The Des Moines River is a major tributary of the Mississippi River that flows through Iowa and Minnesota, playing a central role in the geography and history of Des Moines and the surrounding region.
-
D.
Raccoon River
The Raccoon River is a central Iowa waterway that flows through the Des Moines area and serves as a major source of the city's drinking water and recreation.
-
E.
Upper Iowa River
The Upper Iowa River is a scenic waterway in northeastern Iowa known for its limestone bluffs, trout fishing, and popular canoeing and kayaking routes.
- 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: West Branch Iowa River Target entity description: The West Branch Iowa River is a tributary stream in Iowa that serves as one of the primary headwaters forming the Iowa River.
-
A.
East Branch Iowa River
The East Branch Iowa River is a tributary stream in Iowa that serves as one of the primary headwaters forming the Iowa River.
-
B.
Iowa River
The Iowa River is a major waterway in the U.S. state of Iowa that flows generally southeastward and ultimately joins the Mississippi River.
-
C.
Des Moines River
The Des Moines River is a major tributary of the Mississippi River that flows through Iowa and Minnesota, playing a central role in the geography and history of Des Moines and the surrounding region.
-
D.
Raccoon River
The Raccoon River is a central Iowa waterway that flows through the Des Moines area and serves as a major source of the city's drinking water and recreation.
-
E.
Upper Iowa River
The Upper Iowa River is a scenic waterway in northeastern Iowa known for its limestone bluffs, trout fishing, and popular canoeing and kayaking routes.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
river
ⓘ
tributary ⓘ |
| basinCountry |
United States
ⓘ
linked to:
United States of America
|
| confluenceWith | East Branch Iowa River ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| flowsThrough |
central Iowa
ⓘ
north-central Iowa ⓘ |
| forms | Iowa River at its confluence with the East Branch Iowa River ⓘ |
| formsHeadwatersOf | Iowa River ⓘ |
| hasMouthElevation | approximately 860 feet ⓘ |
| hasName | West Branch Iowa River ⓘ |
| hasSourceElevation | approximately 1,200 feet ⓘ |
| hasWatershedLandUse | predominantly agricultural ⓘ |
| locatedIn |
Franklin County, Iowa
ⓘ
Hancock County, Iowa ⓘ Hardin County, Iowa ⓘ Iowa ⓘ Marshall County, Iowa ⓘ Tama County, Iowa ⓘ Wright County, Iowa ⓘ |
| mouthOf | Iowa River ⓘ |
| partOf |
Mississippi River watershed
ⓘ
linked to:
Mississippi River basin
|
| region | Midwestern United States ⓘ |
| riverSystem | Iowa River ⓘ |
| state | Iowa ⓘ |
| tributaryOf | Iowa River ⓘ |
| usedFor |
agricultural drainage
ⓘ
local recreation ⓘ |
| watercourseType | perennial stream ⓘ |
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: West Branch Iowa River Description of subject: The West Branch Iowa River is a tributary stream in Iowa that serves as one of the primary headwaters forming the Iowa River.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: West Branch Iowa River