Triple
T18248342
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | CTA 2200-series railcars |
E437012
|
entity |
| Predicate | usedOnLine |
P15252
|
FINISHED |
| Object | Douglas branch |
—
|
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: Douglas branch | Statement: [CTA 2200-series railcars, usedOnLine, Douglas branch]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Douglas branch Context triple: [CTA 2200-series railcars, usedOnLine, Douglas branch]
-
A.
Douglas branch
chosen
The Douglas branch was a former elevated rapid transit line in Chicago that once served as part of the city's "L" system.
-
B.
Red Douglas branch
The Red Douglas branch was a powerful cadet line of the medieval Scottish Douglas family, distinguished from the senior “Black Douglas” line and prominent in late medieval Scottish politics.
-
C.
Preston Branch
Preston Branch is a short offshoot of England’s Lancaster Canal that was built to provide a navigable link to the city of Preston.
-
D.
Gladstone Branch
The Gladstone Branch is a commuter rail line in New Jersey that provides service between Gladstone and Hoboken/New York as part of NJ Transit's Morris & Essex Lines network.
-
E.
Porter Branch
Porter Branch is a local public library facility that serves as one of the community branches of the Central Rappahannock Regional Library system.
- 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_69d8b91104e08190a8241f7d260a5162 |
completed | April 10, 2026, 8:47 a.m. |
| NER | Named-entity recognition | batch_69e4f7e89b288190a286797ec2cd60a8 |
completed | April 19, 2026, 3:42 p.m. |
Created at: April 10, 2026, 10:33 a.m.