Triple
T214607
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | 2009 Red Line collision |
E4791
|
entity |
| Predicate | instanceOf |
P0
|
FINISHED |
| Object | public transportation disaster |
C223
|
CONCEPT FINISHED |
How this triple was built (1 step)
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.
CD
Concept disambiguation
gpt-5-mini-2025-08-07
Target class: public transportation disaster Context triple: [2009 Red Line collision, instanceOf, public transportation disaster]
-
A.
public transit system
A public transit system is an organized network of shared transportation services—such as buses, trains, subways, and trams—designed to move large numbers of people efficiently within and between urban and regional areas.
-
B.
rail transit
Rail transit is a public transportation system that moves passengers or freight along fixed steel tracks using trains, subways, trams, or light rail vehicles, typically in urban or intercity corridors.
-
C.
disaster
chosen
A disaster is a sudden, disruptive event—natural or human-made—that causes significant harm to people, property, or the environment and overwhelms normal coping capacities.
-
D.
streetcar system
A streetcar system is an urban public transit network that operates rail vehicles on fixed tracks, typically embedded in city streets, to transport passengers along defined routes.
-
E.
public transportation agency
A public transportation agency is an organization responsible for planning, operating, and managing shared transit services such as buses, trains, and other modes to provide mobility for the public within a defined region.
- F. None of above.
Provenance (1 batch)
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_69a2575cb1dc8190a01ad332426dc339 |
completed | Feb. 28, 2026, 2:47 a.m. |
Created at: Feb. 28, 2026, 2:52 a.m.