Triple
T1391298
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Metra |
E29963
|
entity |
| Predicate | operates |
P24
|
FINISHED |
| Object | Metra Electric South Chicago Branch |
E52738
|
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 Electric South Chicago Branch | Statement: [Metra, operates, Metra Electric South Chicago Branch]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Metra Electric South Chicago Branch Context triple: [Metra, operates, Metra Electric South Chicago Branch]
-
A.
Metra Rock Island District line
The Metra Rock Island District line is a commuter rail route in the Chicago metropolitan area that connects downtown Chicago with various southwest suburbs, including Tinley Park.
-
B.
Metra Electric District line
chosen
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.
IND 63rd Street Line
The IND 63rd Street Line is a New York City Subway line in Manhattan and Queens that carries F and sometimes other services through the 63rd Street Tunnel.
-
D.
Metra Rock Island District 35th Street station
Metra Rock Island District 35th Street station is a commuter rail stop in Chicago serving the Rock Island District line, located near Guaranteed Rate Field and providing access to the surrounding Bronzeville and Bridgeport areas.
-
E.
Northwestern Elevated Railroad
The Northwestern Elevated Railroad was an early elevated rapid transit line in Chicago that later became part of the city’s unified "L" system.
- 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_69a498dc92f8819094a1108f8ac90f43 |
completed | March 1, 2026, 7:51 p.m. |
| NER | Named-entity recognition | batch_69a4c35f7ab081909fe81dd475d6196f |
completed | March 1, 2026, 10:53 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69adb5af961c8190aed3129dab0fecf3 |
completed | March 8, 2026, 5:45 p.m. |
Created at: March 1, 2026, 7:59 p.m.