Union Pacific Northwest Line
E195850
The Union Pacific Northwest Line is a commuter rail route serving Chicago and its northwestern suburbs as part of the Metra rail system.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Union Pacific Northwest Line canonical | 11 |
| Union Pacific Northwest Line corridor | 1 |
| Union Pacific Northwest Line stations | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1391288 — 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: Union Pacific Northwest Line Context triple: [Metra, operates, Union Pacific Northwest Line]
-
A.
Union Pacific North Line
The Union Pacific North Line is a Metra commuter rail line in the Chicago metropolitan area that runs north from downtown Chicago through suburbs along Lake Michigan into Kenosha, Wisconsin.
-
B.
Northern Pacific Railway
The Northern Pacific Railway was a major transcontinental railroad in the northern United States that played a key role in opening and developing the Pacific Northwest in the late 19th and early 20th centuries.
-
C.
Spokane, Portland and Seattle Railway
The Spokane, Portland and Seattle Railway was an early 20th-century Pacific Northwest railroad line, backed by railroad magnate James J. Hill, that connected key cities along the Columbia River and facilitated regional trade and transportation.
-
D.
Union Pacific Railroad
Union Pacific Railroad is one of the largest freight rail networks in the United States, operating an extensive system that spans the western two-thirds of the country.
-
E.
Southern Pacific Railroad
Southern Pacific Railroad was a major American railroad company that operated extensive rail networks across the western and southwestern United States from the 19th to the late 20th century.
- 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: Union Pacific Northwest Line Target entity description: The Union Pacific Northwest Line is a commuter rail route serving Chicago and its northwestern suburbs as part of the Metra rail system.
-
A.
Union Pacific North Line
The Union Pacific North Line is a Metra commuter rail line in the Chicago metropolitan area that runs north from downtown Chicago through suburbs along Lake Michigan into Kenosha, Wisconsin.
-
B.
Northern Pacific Railway
The Northern Pacific Railway was a major transcontinental railroad in the northern United States that played a key role in opening and developing the Pacific Northwest in the late 19th and early 20th centuries.
-
C.
Spokane, Portland and Seattle Railway
The Spokane, Portland and Seattle Railway was an early 20th-century Pacific Northwest railroad line, backed by railroad magnate James J. Hill, that connected key cities along the Columbia River and facilitated regional trade and transportation.
-
D.
Union Pacific Railroad
Union Pacific Railroad is one of the largest freight rail networks in the United States, operating an extensive system that spans the western two-thirds of the country.
-
E.
Southern Pacific Railroad
Southern Pacific Railroad was a major American railroad company that operated extensive rail networks across the western and southwestern United States from the 19th to the late 20th century.
- F. None of above. chosen
Statements (26)
| Predicate | Object |
|---|---|
| instanceOf |
Metra line
ⓘ
commuter rail line ⓘ |
| category |
Commuter rail lines in Illinois
ⓘ
Metra ⓘ
surface form:
Metra lines
Rail infrastructure in Chicago ⓘ |
| commuterRailSystem | Metra ⓘ |
| direction | northwest from downtown Chicago ⓘ |
| electrification | none ⓘ |
| fareSystem | Metra zone-based fares ⓘ |
| historicalOperator |
Chicago and North Western Railway Company
ⓘ
surface form:
Chicago and North Western Railway
|
| lineColor | dark green (Metra system maps) ⓘ |
| locale | Illinois ⓘ |
| mainTerminalInChicago | Ogilvie Transportation Center ⓘ |
| operator | Metra ⓘ |
| owner | Union Pacific Railroad ⓘ |
| parentRailroadCorridor | Union Pacific Railroad ⓘ |
| primaryCityServed |
Chicago, Illinois, United States
ⓘ
surface form:
Chicago, Illinois
|
| serves |
City of Chicago
ⓘ
surface form:
Chicago
northwestern suburbs of Chicago ⓘ |
| serviceType | commuter rail ⓘ |
| system | Metra ⓘ |
| terminus |
Harvard, Illinois
ⓘ
McHenry, Illinois ⓘ Ogilvie Transportation Center ⓘ |
| trackGauge | standard gauge ⓘ |
| usesRollingStock | diesel locomotive-hauled coaches ⓘ |
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: Union Pacific Northwest Line Description of subject: The Union Pacific Northwest Line is a commuter rail route serving Chicago and its northwestern suburbs as part of the Metra rail system.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Union Pacific Northwest Line stations
this entity surface form:
Union Pacific Northwest Line corridor