Triple
T19692430
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | WMATA Blue Line Potomac River crossing |
E472868
|
entity |
| Predicate | instanceOf |
P0
|
FINISHED |
| Object | railway bridge segment |
C4025
|
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: railway bridge segment Context triple: [WMATA Blue Line Potomac River crossing, instanceOf, railway bridge segment]
-
A.
railway bridge
chosen
A railway bridge is a structure built to carry train tracks over obstacles such as roads, rivers, valleys, or other railways, ensuring safe and continuous rail transport.
-
B.
railroad bridge
A railroad bridge is a specialized structure that carries railway tracks over obstacles such as roads, rivers, valleys, or other rail lines, ensuring safe and continuous train passage.
-
C.
road and rail bridge
A road and rail bridge is a structure that spans physical obstacles to simultaneously carry both vehicular road traffic and railway lines across them.
-
D.
cast-iron bridge
A cast-iron bridge is a structure whose primary load-bearing elements are made from cast iron, typically featuring modular, prefabricated components assembled to span a gap such as a river or roadway.
-
E.
iron bridge
An iron bridge is a structural crossing composed primarily of iron elements, designed to span physical obstacles such as rivers or valleys while supporting loads like vehicles, pedestrians, or trains.
- 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_69d8e515bef88190bc30781aea50537a |
completed | April 10, 2026, 11:55 a.m. |
Created at: April 10, 2026, 1:46 p.m.