Metra Union Pacific Northwest Line
E128947
The Metra Union Pacific Northwest Line is a commuter rail line in the Chicago metropolitan area that provides service between downtown Chicago and its northwestern suburbs, including parts of McHenry County, Illinois.
All labels observed (4)
How this entity was disambiguated
This entity first appeared as the object of triple T844928 — 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: Metra Union Pacific Northwest Line Context triple: [McHenry County, Illinois, hasRailService, Metra Union Pacific Northwest Line]
-
A.
Metra Union Pacific West Line
The Metra Union Pacific West Line is a commuter rail line in the Chicago metropolitan area that runs between downtown Chicago and western suburbs, including communities in DuPage County.
-
B.
Metra BNSF Railway Line
The Metra BNSF Railway Line is a major Chicago-area commuter rail route running between Chicago Union Station and Aurora, Illinois, primarily along tracks owned by BNSF Railway.
-
C.
Metra Electric District line
The Metra Electric District line is a commuter rail line in the Chicago metropolitan area that runs from downtown Chicago to its southern suburbs, serving key destinations along the South Side and beyond.
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D.
Metra
Metra is the commuter rail system serving the Chicago metropolitan area, operating extensive routes that connect the city with its surrounding suburbs.
-
E.
METRO Blue Line
The METRO Blue Line is a major light rail transit route in the Minneapolis–Saint Paul metropolitan area that connects downtown Minneapolis with the Mall of America and Minneapolis–Saint Paul International Airport.
- 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: Metra Union Pacific Northwest Line Target entity description: The Metra Union Pacific Northwest Line is a commuter rail line in the Chicago metropolitan area that provides service between downtown Chicago and its northwestern suburbs, including parts of McHenry County, Illinois.
-
A.
Metra Union Pacific West Line
The Metra Union Pacific West Line is a commuter rail line in the Chicago metropolitan area that runs between downtown Chicago and western suburbs, including communities in DuPage County.
-
B.
Metra BNSF Railway Line
The Metra BNSF Railway Line is a major Chicago-area commuter rail route running between Chicago Union Station and Aurora, Illinois, primarily along tracks owned by BNSF Railway.
-
C.
Metra Electric District line
The Metra Electric District line is a commuter rail line in the Chicago metropolitan area that runs from downtown Chicago to its southern suburbs, serving key destinations along the South Side and beyond.
-
D.
Metra
Metra is the commuter rail system serving the Chicago metropolitan area, operating extensive routes that connect the city with its surrounding suburbs.
-
E.
METRO Blue Line
The METRO Blue Line is a major light rail transit route in the Minneapolis–Saint Paul metropolitan area that connects downtown Minneapolis with the Mall of America and Minneapolis–Saint Paul International Airport.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf | commuter rail line ⓘ |
| cityTerminus |
City of Chicago
ⓘ
surface form:
Chicago
|
| commuterServiceBegan | 1984 (under Metra brand) ⓘ |
| connectsWith |
Chicago Transit Authority
ⓘ
surface form:
Chicago Transit Authority bus network
CTA rail network ⓘ
surface form:
Chicago Transit Authority rapid transit system
Metra BNSF Railway Line ⓘ
surface form:
Metra BNSF Railway Line at downtown Chicago
Metra Milwaukee District lines at downtown Chicago ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| electrification | not electrified ⓘ |
| endPoint |
Harvard, Illinois
ⓘ
McHenry, Illinois ⓘ |
| fareSystem | Metra zone-based fares ⓘ |
| formerOwner |
Chicago and North Western Railway Company
ⓘ
surface form:
Chicago and North Western Railway
|
| gauge | standard gauge ⓘ |
| lineNumber | UP-NW ⓘ |
| locale |
Chicago metropolitan area
ⓘ
Cook County, Illinois ⓘ Illinois ⓘ Kane County, Illinois ⓘ McHenry County, Illinois ⓘ |
| openingDate | 19th century (as part of Chicago and North Western Railway main line) ⓘ |
| operator | Metra ⓘ |
| owner |
Metra
ⓘ
surface form:
Metra (commuter operations)
|
| ownerOfInfrastructure | Union Pacific Railroad ⓘ |
| partOf |
Metra
ⓘ
surface form:
Metra commuter rail network
|
| primaryStation | Ogilvie Transportation Center ⓘ |
| primaryUse | commuter transportation ⓘ |
| rollingStock |
bi-level commuter coaches
ⓘ
diesel locomotives ⓘ |
| serves |
McHenry County, Illinois
ⓘ
Northwest Side of Chicago ⓘ Northwest suburbs of Cook County ⓘ northwestern suburbs of Chicago ⓘ |
| serviceType | commuter rail ⓘ |
| startPoint |
Chicago, Illinois, United States
ⓘ
surface form:
Chicago, Illinois
|
| state | Illinois ⓘ |
| suburbanTerminus |
Harvard
ⓘ
McHenry, Illinois ⓘ
surface form:
McHenry
|
| system | Metra ⓘ |
| terminus |
Harvard
ⓘ
McHenry, Illinois ⓘ
surface form:
McHenry
Ogilvie Transportation Center ⓘ |
| trackConfiguration |
double track
ⓘ
triple track (in some segments) ⓘ |
| usesTracksOf | Union Pacific Railroad ⓘ |
| weekdayService | peak-direction express and local trains ⓘ |
| weekendService | reduced schedule compared to weekdays ⓘ |
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: Metra Union Pacific Northwest Line Description of subject: The Metra Union Pacific Northwest Line is a commuter rail line in the Chicago metropolitan area that provides service between downtown Chicago and its northwestern suburbs, including parts of McHenry County, Illinois.
Referenced by (14)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Union Pacific Northwest Line at Ogilvie Transportation Center
this entity surface form:
Metra Union Pacific District
this entity surface form:
Metra Union Pacific Northwest Line terminus