Triple

T5036850

Position	Surface form	Disambiguated ID	Type / Status
Subject	Moffat Tunnel route	`E113445`	entity
Predicate	historicalOperator	`P2834`	FINISHED
Object	Denver and Salt Lake Railway The Denver and Salt Lake Railway was an early 20th-century Colorado railroad that pioneered a challenging mountain route across the Rockies, later forming a key part of regional transcontinental rail service.	`E488666`	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: Denver and Salt Lake Railway | Statement: [Moffat Tunnel route, historicalOperator, Denver and Salt Lake Railway]

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

Target entity: Denver and Salt Lake Railway
Context triple: [Moffat Tunnel route, historicalOperator, Denver and Salt Lake Railway]

A. Leadville Colorado & Southern Railroad
The Leadville Colorado & Southern Railroad is a heritage tourist railway in Leadville, Colorado, offering scenic rides through the Rocky Mountains along historic narrow-gauge mining routes.
B. Denver and Rio Grande Western Railroad
The Denver and Rio Grande Western Railroad was a historic U.S. railroad known for its scenic mountain routes through Colorado and Utah and its role in transcontinental passenger and freight service.
C. Union Pacific West Line
The Union Pacific West Line is a commuter rail route in the Chicago metropolitan area that runs between downtown Chicago and western suburbs, providing daily passenger service as part of the Metra system.
D. Union Pacific Moffat Subdivision
The Union Pacific Moffat Subdivision is a major railroad line in Colorado that carries freight and passenger trains through the Rocky Mountains via the historic Moffat Tunnel and surrounding mountain passes.
E. Union Pacific North Line
The Union Pacific North Line is a Metra commuter rail line in the Chicago metropolitan area that runs north from downtown Chicago through suburbs along Lake Michigan into Kenosha, Wisconsin.
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: Denver and Salt Lake Railway
Triple: [Moffat Tunnel route, historicalOperator, Denver and Salt Lake Railway]

Generated description

The Denver and Salt Lake Railway was an early 20th-century Colorado railroad that pioneered a challenging mountain route across the Rockies, later forming a key part of regional transcontinental rail service.

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

Target entity: Denver and Salt Lake Railway
Target entity description: The Denver and Salt Lake Railway was an early 20th-century Colorado railroad that pioneered a challenging mountain route across the Rockies, later forming a key part of regional transcontinental rail service.

A. Leadville Colorado & Southern Railroad
The Leadville Colorado & Southern Railroad is a heritage tourist railway in Leadville, Colorado, offering scenic rides through the Rocky Mountains along historic narrow-gauge mining routes.
B. Denver and Rio Grande Western Railroad
The Denver and Rio Grande Western Railroad was a historic U.S. railroad known for its scenic mountain routes through Colorado and Utah and its role in transcontinental passenger and freight service.
C. Union Pacific West Line
The Union Pacific West Line is a commuter rail route in the Chicago metropolitan area that runs between downtown Chicago and western suburbs, providing daily passenger service as part of the Metra system.
D. Union Pacific Moffat Subdivision chosen
The Union Pacific Moffat Subdivision is a major railroad line in Colorado that carries freight and passenger trains through the Rocky Mountains via the historic Moffat Tunnel and surrounding mountain passes.
E. Union Pacific North Line
The Union Pacific North Line is a Metra commuter rail line in the Chicago metropolitan area that runs north from downtown Chicago through suburbs along Lake Michigan into Kenosha, Wisconsin.
F. None of above.

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_69bd44384298819089c49e7c330ec7b8`	completed	March 20, 2026, 12:57 p.m.
NER	Named-entity recognition	`batch_69bd73bb069c8190af86f1b2f95f3d95`	completed	March 20, 2026, 4:20 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69bea479f01c8190a84ff4973845eb17`	completed	March 21, 2026, 2 p.m.
NEDg	Description generation	`batch_69bea525d9088190b0b655687dd27630`	completed	March 21, 2026, 2:03 p.m.
NED2	Entity disambiguation (via description)	`batch_69bea594850881909cd683670b63a079`	completed	March 21, 2026, 2:05 p.m.

Created at: March 20, 2026, 1:37 p.m.