Triple
T20185501
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Cumbres and Toltec Scenic Railroad |
E492844
|
entity |
| Predicate | hasLocomotiveClass |
P12267
|
FINISHED |
| Object | K-36 steam locomotives |
—
|
NE NERFINISHED |
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: K-36 steam locomotives | Statement: [Cumbres and Toltec Scenic Railroad, hasLocomotiveClass, K-36 steam locomotives]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: K-36 steam locomotives Context triple: [Cumbres and Toltec Scenic Railroad, hasLocomotiveClass, K-36 steam locomotives]
-
A.
AC-9 articulated steam locomotives
The AC-9 articulated steam locomotives were a small class of powerful, coal-burning 2-8-8-4 cab-forward-style engines built in the late 1930s for heavy freight service on the Southern Pacific Railroad, notable for being among the last and most distinctive articulated steam locomotives the railroad operated.
-
B.
Heisler locomotive
A Heisler locomotive is a type of geared steam locomotive, recognizable by its V‑twin cylinder arrangement and used primarily on logging and industrial railroads for hauling heavy loads over steep, rough track.
-
C.
Class 68 locomotive
The Class 68 locomotive is a modern British diesel-electric locomotive used for passenger and freight services, known for its high performance, reliability, and distinctive angular design.
-
D.
ACS-64 locomotives
ACS-64 locomotives are modern electric locomotives built by Siemens for Amtrak, designed for high-speed passenger service on the electrified portions of the U.S. Northeast Corridor.
-
E.
Forney locomotive
The Forney locomotive is a compact 19th-century steam tank locomotive type, notable for its rigid wheelbase and rear-mounted fuel and water tanks, widely used on urban elevated and commuter railways.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: K-36 steam locomotives Target entity description: The K-36 steam locomotives are a class of narrow-gauge, 2-8-2 “Mikado” type engines built for the Denver & Rio Grande Western Railroad, now preserved and operated on heritage lines such as the Cumbres and Toltec Scenic Railroad.
-
A.
AC-9 articulated steam locomotives
The AC-9 articulated steam locomotives were a small class of powerful, coal-burning 2-8-8-4 cab-forward-style engines built in the late 1930s for heavy freight service on the Southern Pacific Railroad, notable for being among the last and most distinctive articulated steam locomotives the railroad operated.
-
B.
Heisler locomotive
A Heisler locomotive is a type of geared steam locomotive, recognizable by its V‑twin cylinder arrangement and used primarily on logging and industrial railroads for hauling heavy loads over steep, rough track.
-
C.
Class 68 locomotive
The Class 68 locomotive is a modern British diesel-electric locomotive used for passenger and freight services, known for its high performance, reliability, and distinctive angular design.
-
D.
ACS-64 locomotives
ACS-64 locomotives are modern electric locomotives built by Siemens for Amtrak, designed for high-speed passenger service on the electrified portions of the U.S. Northeast Corridor.
-
E.
Forney locomotive
The Forney locomotive is a compact 19th-century steam tank locomotive type, notable for its rigid wheelbase and rear-mounted fuel and water tanks, widely used on urban elevated and commuter railways.
- F. None of above. chosen
PD
Predicate disambiguation
gpt-5-mini-2025-08-07
Target predicate: hasLocomotiveClass Context triple: [Cumbres and Toltec Scenic Railroad, hasLocomotiveClass, K-36 steam locomotives]
-
A.
hasLocomotive
chosen
Indicates that one entity possesses or is equipped with a locomotive as part of its composition or operation.
-
B.
typicalLocomotiveClass
Indicates that one locomotive class is the standard or most commonly used class for a given context, operator, or service.
-
C.
laterLocomotiveType
Indicates that one locomotive type succeeds or comes after another in time, representing a later development or version in locomotive design.
-
D.
primaryLocomotiveType
Indicates the main method or mechanism by which an entity typically moves or travels.
-
E.
associatedWithLocomotive
Indicates a relationship where something is connected or related to a locomotive, such as by use, function, origin, or context.
- F. None of above.
Provenance (3 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_69da6268a034819081cbd9ea5a1c9475 |
completed | April 11, 2026, 3:02 p.m. |
| NER | Named-entity recognition | batch_69e668f2c03c819096336462f59dba91 |
completed | April 20, 2026, 5:57 p.m. |
| PD | Predicate disambiguation | batch_69e55b11124c8190babacf2a0fe2d057 |
completed | April 19, 2026, 10:45 p.m. |
Created at: April 11, 2026, 11:36 p.m.