Triple
T6149777
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Orland Park 143rd Street station |
E137168
|
entity |
| Predicate | fareSystem |
P395
|
FINISHED |
| Object |
Metra fare system
The Metra fare system is the zone-based ticketing and pricing structure used across the Metra commuter rail network in the Chicago metropolitan area.
|
E29963
|
NE FINISHED |
How this triple was built (4 steps)
Every LLM step that produced this triple, in pipeline order — named-entity classification, the disambiguation choices (the exact options shown, with the pick highlighted), and the generated description. The batch + timestamp of each is in the Provenance table below.
NER
Named-entity recognition
gpt-5-mini
Instruction
Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).
Input
Phrase: Metra fare system | Statement: [Orland Park 143rd Street station, fareSystem, Metra fare system]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Metra fare system Context triple: [Orland Park 143rd Street station, fareSystem, Metra fare system]
-
A.
Metra
Metra is the commuter rail system serving the Chicago metropolitan area, operating extensive routes that connect the city with its surrounding suburbs.
-
B.
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.
-
C.
Metra at Jefferson Park
Metra at Jefferson Park is a commuter rail station in Chicago’s Jefferson Park neighborhood that serves as a key transfer point between Metra trains and CTA transit services.
-
D.
Metra Heritage Corridor
The Metra Heritage Corridor is a commuter rail line in the Chicago metropolitan area that provides weekday service between Chicago Union Station and Joliet, Illinois, largely following the historic Illinois & Michigan Canal corridor.
-
E.
Metra SouthWest Service
Metra SouthWest Service is a commuter rail line in the Chicago metropolitan area that connects downtown Chicago with southwestern suburbs including Orland Park, Illinois.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg
Description generation
gpt-5.1
Instruction
Generate a one-sentence description of the target entity. You are given a context triple in the form (subject, predicate, object), where the object is the target entity. # Instructions Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. Avoid repeating the information from the triple, unless really essential. # Response Format Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Metra fare system Triple: [Orland Park 143rd Street station, fareSystem, Metra fare system]
Generated description
The Metra fare system is the zone-based ticketing and pricing structure used across the Metra commuter rail network in the Chicago metropolitan area.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Metra fare system Target entity description: The Metra fare system is the zone-based ticketing and pricing structure used across the Metra commuter rail network in the Chicago metropolitan area.
-
A.
Metra
chosen
Metra is the commuter rail system serving the Chicago metropolitan area, operating extensive routes that connect the city with its surrounding suburbs.
-
B.
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.
-
C.
Metra at Jefferson Park
Metra at Jefferson Park is a commuter rail station in Chicago’s Jefferson Park neighborhood that serves as a key transfer point between Metra trains and CTA transit services.
-
D.
Metra Heritage Corridor
The Metra Heritage Corridor is a commuter rail line in the Chicago metropolitan area that provides weekday service between Chicago Union Station and Joliet, Illinois, largely following the historic Illinois & Michigan Canal corridor.
-
E.
Metra SouthWest Service
Metra SouthWest Service is a commuter rail line in the Chicago metropolitan area that connects downtown Chicago with southwestern suburbs including Orland Park, Illinois.
- F. None of above.
Provenance (5 batches)
The batch behind each pipeline step, in order, with when it ran. Timestamps are batch-level — stages were processed in waves, so the object chain (NER → NED1 → NEDg → NED2) reads in order, but predicate / elicitation batches can sit in a different wave.
| Step | Stage | Batch ID | Status | When |
|---|---|---|---|---|
| creating | Elicitation | batch_69c008a2c6308190a56519b22d55d083 |
completed | March 22, 2026, 3:20 p.m. |
| NER | Named-entity recognition | batch_69c05ce329648190a03ba0233df841fa |
completed | March 22, 2026, 9:19 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69c16ed4abc88190993cfd4ef4f2862e |
completed | March 23, 2026, 4:48 p.m. |
| NEDg | Description generation | batch_69c1bfb484ac8190903efdf4a18f3a1c |
completed | March 23, 2026, 10:33 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69c1c03551008190af5e3427b4cdcd11 |
completed | March 23, 2026, 10:35 p.m. |
Created at: March 22, 2026, 4:16 p.m.