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.