Triple
T18520729
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | USRA Light Santa Fe 2-10-2 |
E452574
|
entity |
| Predicate | hasValveGear |
P49897
|
FINISHED |
| Object | Walschaerts valve gear |
—
|
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: Walschaerts valve gear | Statement: [USRA Light Santa Fe 2-10-2, hasValveGear, Walschaerts valve gear]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Walschaerts valve gear Context triple: [USRA Light Santa Fe 2-10-2, hasValveGear, Walschaerts valve gear]
-
A.
Walschaerts
chosen
Walschaerts valve gear is a widely used steam locomotive valve gear mechanism, developed in the 19th century, that precisely controls steam admission and exhaust to the cylinders.
-
B.
Stephenson valve gear
Stephenson valve gear is an early and widely used type of steam locomotive valve gear that uses eccentrics mounted on the driving axle to control steam admission and exhaust to the cylinders.
-
C.
Watt steam engine
The Watt steam engine was a vastly improved steam engine developed in the late 18th century that greatly increased efficiency and helped power the Industrial Revolution.
-
D.
Stephenson's Rocket
Stephenson's Rocket is an early 19th-century steam locomotive famous for winning the 1829 Rainhill Trials and proving the viability of railway transport.
-
E.
Clerget 9B rotary engine
The Clerget 9B rotary engine was a widely used French World War I aircraft engine known for powering many Allied fighters and seaplanes.
- 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_69d8d386df84819092355ebb260d848e |
completed | April 10, 2026, 10:40 a.m. |
| NER | Named-entity recognition | batch_69e5338db5e4819086503a2176dfe499 |
completed | April 19, 2026, 7:57 p.m. |
Created at: April 10, 2026, 11:37 a.m.