Triple
T21637318
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Metra commuter rail services at Chicago Union Station |
E533993
|
entity |
| Predicate | line |
P1293
|
FINISHED |
| Object | North Central Service |
—
|
NE NERFINISHED |
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: North Central Service | Statement: [Metra commuter rail services at Chicago Union Station, line, North Central Service]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: North Central Service Context triple: [Metra commuter rail services at Chicago Union Station, line, North Central Service]
-
A.
North Central Service line
chosen
The North Central Service line is a Metra commuter rail route in the Chicago metropolitan area that runs between downtown Chicago and northern suburbs near Antioch, Illinois.
-
B.
North Central Service stations
North Central Service stations are commuter rail stops in northeastern Illinois served by Metra's North Central Service line connecting Chicago to its northern suburbs.
-
C.
Northcentral Electric Cooperative
Northcentral Electric Cooperative is a member-owned utility company that provides electric power services to residents and businesses in and around Byhalia, Mississippi.
-
D.
North Central Dawan
North Central Dawan is a regional dialect variety of the Dawan language spoken by communities in the central northern part of West Timor.
-
E.
GTE Midwest
GTE Midwest was a regional telephone operating company that provided local and long-distance telecommunications services in parts of the Midwestern United States under the former GTE Corporation.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Provenance (2 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_69e0c465ae7481908577b7209fdb2a77 |
completed | April 16, 2026, 11:13 a.m. |
| NER | Named-entity recognition | batch_69ef538eef0481908f5bf0e27f8e054d |
completed | April 27, 2026, 12:16 p.m. |
Created at: April 16, 2026, 6:35 p.m.