Triple

T17069309

Position	Surface form	Disambiguated ID	Type / Status
Subject	Union Pacific Heritage Fleet	`E414171`	entity
Predicate	includes	`P1393`	FINISHED
Object	Union Pacific 4014 Union Pacific 4014, known as "Big Boy," is one of the largest and most powerful steam locomotives ever built, restored to operation for excursion service in the 21st century.	`E1250161`	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: Union Pacific 4014 | Statement: [Union Pacific Heritage Fleet, includes, Union Pacific 4014]

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Union Pacific 4014
Context triple: [Union Pacific Heritage Fleet, includes, Union Pacific 4014]

A. Union Pacific No. 119
Union Pacific No. 119 was the steam locomotive that represented the Union Pacific Railroad at the 1869 Golden Spike ceremony marking the completion of the First Transcontinental Railroad.
B. Union Pacific Challenger
The Union Pacific Challenger was a named passenger train operated by the Union Pacific Railroad, known for providing comfortable, mid-priced long-distance service across the western United States.
C. Southern Pacific GS-4
The Southern Pacific GS-4 is a class of streamlined 4-8-4 "Northern" steam locomotives built in the 1940s for the Southern Pacific Railroad, renowned for their distinctive orange and red "Daylight" livery and high-speed passenger service.
D. Union Pacific Heritage Fleet
The Union Pacific Heritage Fleet is a collection of restored historic passenger cars and locomotives maintained by Union Pacific Railroad for special excursions, public relations, and preservation of the company’s railroading legacy.
E. Central Pacific Railroad No. 173
Central Pacific Railroad No. 173 was a 19th-century steam locomotive whose design and appearance helped inspire the look of Disneyland’s C.K. Holliday engine.
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: Union Pacific 4014
Triple: [Union Pacific Heritage Fleet, includes, Union Pacific 4014]

Generated description

Union Pacific 4014, known as "Big Boy," is one of the largest and most powerful steam locomotives ever built, restored to operation for excursion service in the 21st century.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Union Pacific 4014
Target entity description: Union Pacific 4014, known as "Big Boy," is one of the largest and most powerful steam locomotives ever built, restored to operation for excursion service in the 21st century.

A. Union Pacific No. 119
Union Pacific No. 119 was the steam locomotive that represented the Union Pacific Railroad at the 1869 Golden Spike ceremony marking the completion of the First Transcontinental Railroad.
B. Union Pacific Challenger
The Union Pacific Challenger was a named passenger train operated by the Union Pacific Railroad, known for providing comfortable, mid-priced long-distance service across the western United States.
C. Southern Pacific GS-4
The Southern Pacific GS-4 is a class of streamlined 4-8-4 "Northern" steam locomotives built in the 1940s for the Southern Pacific Railroad, renowned for their distinctive orange and red "Daylight" livery and high-speed passenger service.
D. Union Pacific Heritage Fleet
The Union Pacific Heritage Fleet is a collection of restored historic passenger cars and locomotives maintained by Union Pacific Railroad for special excursions, public relations, and preservation of the company’s railroading legacy.
E. Central Pacific Railroad No. 173
Central Pacific Railroad No. 173 was a 19th-century steam locomotive whose design and appearance helped inspire the look of Disneyland’s C.K. Holliday engine.
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_69d886cef44c8190ba56c44b4e863e64`	completed	April 10, 2026, 5:12 a.m.
NER	Named-entity recognition	`batch_69e3dbbfb1f08190807301ff6e573cf5`	completed	April 18, 2026, 7:30 p.m.
NED1	Entity disambiguation (via context triple)	`batch_6a012eda04d08190b450fbfc6ccb9054`	completed	May 11, 2026, 1:20 a.m.
NEDg	Description generation	`batch_6a01306334088190b6199b9bdd728c3c`	completed	May 11, 2026, 1:26 a.m.
NED2	Entity disambiguation (via description)	`batch_6a01343b21508190bd8dc59765ec7f78`	completed	May 11, 2026, 1:43 a.m.

Created at: April 10, 2026, 5:34 a.m.