Triple

T7303332

Position	Surface form	Disambiguated ID	Type / Status
Subject	AC-8	`E167911`	entity
Predicate	precededBy	`P97`	FINISHED
Object	Southern Pacific AC-7 The Southern Pacific AC-7 was a class of massive articulated cab-forward steam locomotives used by the Southern Pacific Railroad, notable for hauling heavy freight over steep mountain grades in the early 20th century.	`E654924`	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: Southern Pacific AC-7 | Statement: [AC-8, precededBy, Southern Pacific AC-7]

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

Target entity: Southern Pacific AC-7
Context triple: [AC-8, precededBy, Southern Pacific AC-7]

A. Southern Pacific AC-11
The Southern Pacific AC-11 was a class of massive articulated cab-forward steam locomotives used by the Southern Pacific Railroad, primarily designed for heavy freight service over steep mountain grades.
B. Southern Pacific AC-9
The Southern Pacific AC-9 was a class of massive articulated 2-8-8-4 steam locomotives built in the late 1930s for the Southern Pacific Railroad, primarily used for heavy freight service across challenging western routes.
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. Southern Pacific GS-3
The Southern Pacific GS-3 was a class of streamlined 4-8-4 "Northern" type steam locomotives built in the late 1930s for high-speed passenger service on the Southern Pacific Railroad.
E. 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.
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: Southern Pacific AC-7
Triple: [AC-8, precededBy, Southern Pacific AC-7]

Generated description

The Southern Pacific AC-7 was a class of massive articulated cab-forward steam locomotives used by the Southern Pacific Railroad, notable for hauling heavy freight over steep mountain grades in the early 20th century.

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

Target entity: Southern Pacific AC-7
Target entity description: The Southern Pacific AC-7 was a class of massive articulated cab-forward steam locomotives used by the Southern Pacific Railroad, notable for hauling heavy freight over steep mountain grades in the early 20th century.

A. Southern Pacific AC-11
The Southern Pacific AC-11 was a class of massive articulated cab-forward steam locomotives used by the Southern Pacific Railroad, primarily designed for heavy freight service over steep mountain grades.
B. Southern Pacific AC-9
The Southern Pacific AC-9 was a class of massive articulated 2-8-8-4 steam locomotives built in the late 1930s for the Southern Pacific Railroad, primarily used for heavy freight service across challenging western routes.
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. Southern Pacific GS-3
The Southern Pacific GS-3 was a class of streamlined 4-8-4 "Northern" type steam locomotives built in the late 1930s for high-speed passenger service on the Southern Pacific Railroad.
E. 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.
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_69c6888c820881909fc68f689fe1c251`	completed	March 27, 2026, 1:39 p.m.
NER	Named-entity recognition	`batch_69c6ebb2261c8190ae9095c8e110b528`	completed	March 27, 2026, 8:42 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69c7e558098c819091562566c59332e2`	completed	March 28, 2026, 2:27 p.m.
NEDg	Description generation	`batch_69c7e6671e2c8190aed42aa673540efa`	completed	March 28, 2026, 2:32 p.m.
NED2	Entity disambiguation (via description)	`batch_69c7e6cd820881909ef8fd3bc28d2716`	completed	March 28, 2026, 2:33 p.m.

Created at: March 27, 2026, 3:01 p.m.