Triple

T11105235
Position Surface form Disambiguated ID Type / Status
Subject Southern Pacific Railroad E262609 entity
Predicate notableLocomotiveClass P1305 FINISHED
Object Cab-forward steam locomotives
Cab-forward steam locomotives were a distinctive type of steam engine with the crew cab placed at the front of the locomotive to improve visibility and reduce smoke exposure, most famously used by the Southern Pacific Railroad in mountainous terrain.
E905529 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: Cab-forward steam locomotives | Statement: [Southern Pacific Railroad, notableLocomotiveClass, Cab-forward steam locomotives]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Cab-forward steam locomotives
Context triple: [Southern Pacific Railroad, notableLocomotiveClass, Cab-forward steam locomotives]
  • A. USRA standard steam locomotive designs
    USRA standard steam locomotive designs were a series of standardized steam locomotive types created during World War I to simplify and unify locomotive production and maintenance across U.S. railroads.
  • B. 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.
  • C. Locomotive
    Locomotive is the nickname of El Paso Locomotive FC, a professional soccer club based in El Paso, Texas, that competes in the USL Championship.
  • D. Lion steam locomotive
    The Lion steam locomotive is a preserved early 19th-century British steam engine famed for its role in the Liverpool and Manchester Railway and as one of the oldest surviving working locomotives.
  • E. Super Power steam locomotive
    The Super Power steam locomotive was an advanced, high-capacity steam engine design that significantly improved speed and efficiency in American railroading during the early 20th century.
  • 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: Cab-forward steam locomotives
Triple: [Southern Pacific Railroad, notableLocomotiveClass, Cab-forward steam locomotives]
Generated description
Cab-forward steam locomotives were a distinctive type of steam engine with the crew cab placed at the front of the locomotive to improve visibility and reduce smoke exposure, most famously used by the Southern Pacific Railroad in mountainous terrain.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Cab-forward steam locomotives
Target entity description: Cab-forward steam locomotives were a distinctive type of steam engine with the crew cab placed at the front of the locomotive to improve visibility and reduce smoke exposure, most famously used by the Southern Pacific Railroad in mountainous terrain.
  • A. USRA standard steam locomotive designs
    USRA standard steam locomotive designs were a series of standardized steam locomotive types created during World War I to simplify and unify locomotive production and maintenance across U.S. railroads.
  • B. 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.
  • C. Locomotive
    Locomotive is the nickname of El Paso Locomotive FC, a professional soccer club based in El Paso, Texas, that competes in the USL Championship.
  • D. Lion steam locomotive
    The Lion steam locomotive is a preserved early 19th-century British steam engine famed for its role in the Liverpool and Manchester Railway and as one of the oldest surviving working locomotives.
  • E. Super Power steam locomotive
    The Super Power steam locomotive was an advanced, high-capacity steam engine design that significantly improved speed and efficiency in American railroading during the early 20th century.
  • 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_69d6aa9a40d88190a373e2c7e48285db completed April 8, 2026, 7:20 p.m.
NER Named-entity recognition batch_69d79a2e319881909e66d3c0c73b56bc completed April 9, 2026, 12:23 p.m.
NED1 Entity disambiguation (via context triple) batch_69e42d7016908190bb7aadadacb5b50f completed April 19, 2026, 1:18 a.m.
NEDg Description generation batch_69e42f3dd02c8190b40bc692c24b2ff4 completed April 19, 2026, 1:26 a.m.
NED2 Entity disambiguation (via description) batch_69e4375eaf448190a17f8df1e83145e0 completed April 19, 2026, 2:01 a.m.
Created at: April 8, 2026, 9:27 p.m.