Triple
T1422820
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Southern Pacific Cab Forward locomotive |
E30261
|
entity |
| Predicate | classificationBySP |
P28915
|
FINISHED |
| Object |
AC-12
AC-12 was the final and most advanced class of Southern Pacific’s Cab Forward articulated steam locomotives, renowned for their powerful performance in heavy freight service over mountainous terrain.
|
E172335
|
NE FINISHED |
How this triple was built (4 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: AC-12 | Statement: [Southern Pacific Cab Forward locomotive, classificationBySP, AC-12]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: AC-12 Context triple: [Southern Pacific Cab Forward locomotive, classificationBySP, AC-12]
-
A.
AC-11
AC-11 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives designed for heavy freight service over mountainous routes.
-
B.
AC-10
AC-10 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives built for heavy freight service over mountainous routes.
-
C.
AC-5
AC-5 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives built in the late 1920s for heavy freight service over mountainous routes.
-
D.
AC-8
AC-8 was a class of Southern Pacific Railroad articulated steam locomotives in the distinctive cab-forward configuration, used primarily for heavy freight service over mountainous routes in the early 20th century.
-
E.
AC-9
The AC-9 was a class of massive 2-8-8-4 articulated steam locomotives built for the Southern Pacific Railroad, notable for their conventional (non-cab-forward) design and use in heavy freight service.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg
Description generation
gpt-5.1
Instruction
Generate a one-sentence description of the target entity. You are given a context triple in the form (subject, predicate, object), where the object is the target entity. # Instructions Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. Avoid repeating the information from the triple, unless really essential. # Response Format Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: AC-12 Triple: [Southern Pacific Cab Forward locomotive, classificationBySP, AC-12]
Generated description
AC-12 was the final and most advanced class of Southern Pacific’s Cab Forward articulated steam locomotives, renowned for their powerful performance in heavy freight service over mountainous terrain.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: AC-12 Target entity description: AC-12 was the final and most advanced class of Southern Pacific’s Cab Forward articulated steam locomotives, renowned for their powerful performance in heavy freight service over mountainous terrain.
-
A.
AC-11
AC-11 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives designed for heavy freight service over mountainous routes.
-
B.
AC-10
AC-10 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives built for heavy freight service over mountainous routes.
-
C.
AC-5
AC-5 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives built in the late 1920s for heavy freight service over mountainous routes.
-
D.
AC-8
AC-8 was a class of Southern Pacific Railroad articulated steam locomotives in the distinctive cab-forward configuration, used primarily for heavy freight service over mountainous routes in the early 20th century.
-
E.
AC-9
The AC-9 was a class of massive 2-8-8-4 articulated steam locomotives built for the Southern Pacific Railroad, notable for their conventional (non-cab-forward) design and use in heavy freight service.
- F. None of above. chosen
Provenance (5 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_69a498fb823c8190a67ce4c4837e641a |
completed | March 1, 2026, 7:52 p.m. |
| NER | Named-entity recognition | batch_69a4c9df014081908a6e2f41ba012ecc |
completed | March 1, 2026, 11:21 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69ad232534f48190b1392c2fba119b7c |
completed | March 8, 2026, 7:20 a.m. |
| NEDg | Description generation | batch_69ad244de35881908f37bf10fa9cf1c9 |
completed | March 8, 2026, 7:25 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69ad24aea1988190af6e847cc1842520 |
completed | March 8, 2026, 7:26 a.m. |
Created at: March 1, 2026, 8 p.m.