Triple

T10774629
Position Surface form Disambiguated ID Type / Status
Subject Steamtown National Historic Site E254165 entity
Predicate hasLocomotive P12267 FINISHED
Object Canadian National 2-8-2 No. 3254
Canadian National 2-8-2 No. 3254 is a preserved Canadian National Railway Mikado-type steam locomotive renowned for its excursion service and display at Steamtown.
E884971 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: Canadian National 2-8-2 No. 3254 | Statement: [Steamtown National Historic Site, hasLocomotive, Canadian National 2-8-2 No. 3254]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Canadian National 2-8-2 No. 3254
Context triple: [Steamtown National Historic Site, hasLocomotive, Canadian National 2-8-2 No. 3254]
  • A. USRA Heavy Mikado 2-8-2
    The USRA Heavy Mikado 2-8-2 was a standardized World War I–era American steam freight locomotive design known for its robust construction, high tractive effort, and widespread use across multiple railroads.
  • B. Nickel Plate Road 2-8-4 Berkshires
    The Nickel Plate Road 2-8-4 Berkshires were powerful high-speed steam freight locomotives famed for their role in hauling fast freight trains across the Nickel Plate Road in the mid-20th century.
  • C. USRA Light Mikado 2-8-2
    The USRA Light Mikado 2-8-2 was a widely used World War I–era American freight steam locomotive type designed for balanced performance and standardized construction across multiple railroads.
  • D. B&O No. 4500
    B&O No. 4500 is a historic Baltimore & Ohio Railroad steam locomotive preserved for its significance in early 20th-century American railroading.
  • E. USRA Light Mountain 4-8-2
    The USRA Light Mountain 4-8-2 was a standardized World War I–era American steam locomotive design used by multiple railroads for mixed-traffic service under the United States Railroad Administration.
  • 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: Canadian National 2-8-2 No. 3254
Triple: [Steamtown National Historic Site, hasLocomotive, Canadian National 2-8-2 No. 3254]
Generated description
Canadian National 2-8-2 No. 3254 is a preserved Canadian National Railway Mikado-type steam locomotive renowned for its excursion service and display at Steamtown.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Canadian National 2-8-2 No. 3254
Target entity description: Canadian National 2-8-2 No. 3254 is a preserved Canadian National Railway Mikado-type steam locomotive renowned for its excursion service and display at Steamtown.
  • A. USRA Heavy Mikado 2-8-2
    The USRA Heavy Mikado 2-8-2 was a standardized World War I–era American steam freight locomotive design known for its robust construction, high tractive effort, and widespread use across multiple railroads.
  • B. Nickel Plate Road 2-8-4 Berkshires
    The Nickel Plate Road 2-8-4 Berkshires were powerful high-speed steam freight locomotives famed for their role in hauling fast freight trains across the Nickel Plate Road in the mid-20th century.
  • C. USRA Light Mikado 2-8-2
    The USRA Light Mikado 2-8-2 was a widely used World War I–era American freight steam locomotive type designed for balanced performance and standardized construction across multiple railroads.
  • D. B&O No. 4500
    B&O No. 4500 is a historic Baltimore & Ohio Railroad steam locomotive preserved for its significance in early 20th-century American railroading.
  • E. USRA Light Mountain 4-8-2
    The USRA Light Mountain 4-8-2 was a standardized World War I–era American steam locomotive design used by multiple railroads for mixed-traffic service under the United States Railroad Administration.
  • 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_69d6aa609f008190a294200aefcb7bd5 completed April 8, 2026, 7:20 p.m.
NER Named-entity recognition batch_69d7329be784819083b7ec4d85c20acf completed April 9, 2026, 5:01 a.m.
NED1 Entity disambiguation (via context triple) batch_69de238559b48190abc759e744ab0f8e completed April 14, 2026, 11:22 a.m.
NEDg Description generation batch_69de271fb08c8190a44c547083226fd8 completed April 14, 2026, 11:38 a.m.
NED2 Entity disambiguation (via description) batch_69de2cecc24c8190a240366e0600426a completed April 14, 2026, 12:02 p.m.
Created at: April 8, 2026, 9:16 p.m.