Triple
T214605
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | 2009 Red Line collision |
E4791
|
entity |
| Predicate | instanceOf |
P0
|
FINISHED |
| Object | rail accident |
C3560
|
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: rail accident Context triple: [2009 Red Line collision, instanceOf, rail accident]
-
A.
car accident
A car accident is an unexpected collision or incident involving one or more motor vehicles that results in damage, injury, or disruption to normal traffic flow.
-
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.
accident investigation
Accident investigation is the systematic process of collecting and analyzing evidence about an incident to determine its causes and contributing factors, with the goal of preventing similar events in the future.
-
D.
elevated railway
An elevated railway is a rail transport system in which tracks and stations are built on raised structures above ground level, typically supported by columns or girders, to avoid interference with street traffic.
-
E.
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.
- F. None of above. chosen
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.