Triple
T1391295
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Metra |
E29963
|
entity |
| Predicate | operates |
P24
|
FINISHED |
| Object | North Central Service |
E95430
|
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: North Central Service | Statement: [Metra, operates, North Central Service]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: North Central Service Context triple: [Metra, operates, 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.
Overture Services
Overture Services was an early pioneer in pay-per-click search advertising, best known for powering sponsored search results for major web portals in the late 1990s and early 2000s.
-
C.
Kinney National Services
Kinney National Services was a diversified American holding company that became the corporate predecessor to Warner Communications under media executive Steve Ross.
-
D.
Northern Central Railway
Northern Central Railway was a historic American railroad that operated primarily in Pennsylvania and Maryland, serving as an important north–south link in the 19th and early 20th centuries.
-
E.
Chesapeake and Coastal Service
The Chesapeake and Coastal Service is a Maryland state program focused on managing, protecting, and restoring the Chesapeake Bay and the state’s coastal resources through planning, conservation, and community support initiatives.
- 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_69acde24d1d88190bd6d602923270cd1 |
completed | March 8, 2026, 2:25 a.m. |
Created at: March 1, 2026, 7:59 p.m.