Triple
T5814409
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Metra Union Pacific Northwest Line |
E128947
|
entity |
| Predicate | owner |
P347
|
FINISHED |
| Object | Metra (commuter operations) |
E29963
|
NE FINISHED |
How this triple was built (2 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 (commuter operations) | Statement: [Metra Union Pacific Northwest Line, owner, Metra (commuter operations)]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Metra (commuter operations) Context triple: [Metra Union Pacific Northwest Line, owner, Metra (commuter operations)]
-
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 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.
-
D.
Metra North Central Service
Metra North Central Service is a commuter rail line in the Chicago metropolitan area that runs between downtown Chicago and northern suburbs, primarily serving communities along the I-94 and I-294 corridors.
-
E.
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.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Provenance (3 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_69c0084788848190bcf71f6bc5d71597 |
completed | March 22, 2026, 3:18 p.m. |
| NER | Named-entity recognition | batch_69c03361c79081908baf872821e79983 |
completed | March 22, 2026, 6:22 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69c0e35ad1a081908c908b6eef12d855 |
completed | March 23, 2026, 6:53 a.m. |
Created at: March 22, 2026, 3:53 p.m.