Inner Loop
E372116
Inner Loop is the clockwise-traveling elevated rail circuit in downtown Chicago’s Loop that serves multiple Chicago Transit Authority train lines.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Inner Loop canonical | 2 |
| The Loop (inner track) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3597649 — 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: Inner Loop Context triple: [CTA Pink Line, usesLoopTrack, Inner Loop]
-
A.
Inner Loop
Inner Loop is a downtown Miami Metromover route that circulates through the city’s central business district on an automated people mover system.
-
B.
Inner Loop
Inner Loop is the clockwise-traveling set of lanes on the Capital Beltway (Interstate 495) encircling the Washington, D.C. metropolitan area.
-
C.
Outer Loop
Outer Loop is the counterclockwise carriageway of the Capital Beltway (Interstate 495) encircling the Washington, D.C. metropolitan area.
-
D.
B Loop
B Loop is one of the main routes of the Portland Streetcar system, providing modern streetcar service through key neighborhoods in Portland, Oregon.
-
E.
A Loop
A Loop is a modern streetcar route in Portland, Oregon, that provides circulator service through the central city and adjacent neighborhoods as part of the Portland Streetcar system.
- 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: Inner Loop Target entity description: Inner Loop is the clockwise-traveling elevated rail circuit in downtown Chicago’s Loop that serves multiple Chicago Transit Authority train lines.
-
A.
Inner Loop
Inner Loop is the clockwise-traveling set of lanes on the Capital Beltway (Interstate 495) encircling the Washington, D.C. metropolitan area.
-
B.
Inner Loop
Inner Loop is a downtown Miami Metromover route that circulates through the city’s central business district on an automated people mover system.
-
C.
Outer Loop
Outer Loop is the counterclockwise carriageway of the Capital Beltway (Interstate 495) encircling the Washington, D.C. metropolitan area.
-
D.
B Loop
B Loop is one of the main routes of the Portland Streetcar system, providing modern streetcar service through key neighborhoods in Portland, Oregon.
-
E.
A Loop
A Loop is a modern streetcar route in Portland, Oregon, that provides circulator service through the central city and adjacent neighborhoods as part of the Portland Streetcar system.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
Chicago Transit Authority infrastructure
ⓘ
elevated railway loop ⓘ rapid transit route ⓘ |
| connectsWith | Outer Loop ⓘ |
| directionRelativeToOuterLoop | Inner Loop runs clockwise while Outer Loop runs counterclockwise ⓘ |
| electrification | third rail ⓘ |
| fareSystem | Ventra ⓘ |
| hasFeature |
grade-separated right-of-way
ⓘ
steel elevated structure ⓘ |
| hasRole | core hub of CTA rail operations in downtown Chicago ⓘ |
| hasStationArea |
Adams/Wabash station area
ⓘ
linked to:
Adams/Wabash station
Clark/Lake station area ⓘ Harold Washington Library–State/Van Buren station area ⓘ LaSalle/Van Buren station area ⓘ
linked to:
LaSalle/Van Buren station
Quincy station area ⓘ State/Lake station area ⓘ
linked to:
State/Lake station
Washington/Wabash station area ⓘ
linked to:
Washington/Wabash station
Washington/Wells station area ⓘ
linked to:
Washington/Wells station
|
| locatedIn |
Chicago Loop
ⓘ
Chicago, Illinois ⓘ
linked to:
Chicago, Illinois, United States
United States ⓘ
linked to:
United States of America
|
| loopType | unidirectional loop ⓘ |
| operatedBy | Chicago Transit Authority ⓘ |
| owner | Chicago Transit Authority ⓘ |
| parallelTo | Outer Loop ⓘ |
| partOf |
Chicago 'L'
ⓘ
linked to:
Chicago "L"
Loop elevated ⓘ |
| partOfNetwork |
CTA 'L' system
ⓘ
linked to:
CTA rail network
|
| primaryFunction | distribution of CTA trains around downtown Chicago ⓘ |
| safetySystem | automatic block signaling ⓘ |
| servesArea |
Chicago central business district
ⓘ
linked to:
Chicago Loop
|
| servesLine |
Brown Line
ⓘ
Green Line ⓘ Orange Line ⓘ Pink Line ⓘ Purple Line Express ⓘ |
| servicePattern | clockwise loop service around Chicago’s central business district ⓘ |
| structureType | elevated ⓘ |
| ticketing | proof-of-payment system ⓘ |
| trackConfiguration | double track ⓘ |
| travelDirection | clockwise ⓘ |
| usedBy | CTA electric multiple unit trains ⓘ |
| usedFor | urban mass transit ⓘ |
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: Inner Loop Description of subject: Inner Loop is the clockwise-traveling elevated rail circuit in downtown Chicago’s Loop that serves multiple Chicago Transit Authority train lines.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Inner Loop