Triple
T21167244
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Green Line (CTA) main line |
E521596
|
entity |
| Predicate | hasServiceOperator |
P5884
|
FINISHED |
| Object | CTA rail operations division |
—
|
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: CTA rail operations division | Statement: [Green Line (CTA) main line, hasServiceOperator, CTA rail operations division]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: CTA rail operations division Context triple: [Green Line (CTA) main line, hasServiceOperator, CTA rail operations division]
-
A.
CTA rail network
The CTA rail network is the rapid transit system serving Chicago and several surrounding suburbs, commonly known as the "L" and consisting of multiple color-coded lines operating on elevated, subway, and at-grade tracks.
-
B.
RTA Rail
RTA Rail is the light and heavy rail transit system serving Cleveland and its surrounding areas, operated by the Greater Cleveland Regional Transit Authority.
-
C.
Chicago Transit Authority
chosen
The Chicago Transit Authority is the primary public transportation agency serving Chicago and several surrounding suburbs, operating the city’s extensive network of buses and rapid transit trains.
-
D.
Metra
Metra is the commuter rail system serving the Chicago metropolitan area, operating extensive routes that connect the city with its surrounding suburbs.
-
E.
Metro Rail Transit Corporation
Metro Rail Transit Corporation is a private consortium in the Philippines that financed, built, and initially operated Manila’s MRT Line 3 under a public–private partnership.
- 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_69e0b50e30748190b186824a206d39b9 |
completed | April 16, 2026, 10:08 a.m. |
| NER | Named-entity recognition | batch_69e7270fce708190a5715b55b406dd4e |
completed | April 21, 2026, 7:28 a.m. |
Created at: April 16, 2026, 3 p.m.