Triple
T8255203
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Golden Spike ceremony |
E193053
|
entity |
| Predicate | railroadEndpointWest |
P44831
|
FINISHED |
| Object |
Central Pacific line from Sacramento, California
The Central Pacific line from Sacramento, California was the western segment of the first U.S. transcontinental railroad, built eastward over the Sierra Nevada to meet the Union Pacific line at Promontory Summit in 1869.
|
E721090
|
NE FINISHED |
How this triple was built (5 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: Central Pacific line from Sacramento, California | Statement: [Golden Spike ceremony, railroadEndpointWest, Central Pacific line from Sacramento, California]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Central Pacific line from Sacramento, California Context triple: [Golden Spike ceremony, railroadEndpointWest, Central Pacific line from Sacramento, California]
-
A.
Southern Pacific Donner Pass line
The Southern Pacific Donner Pass line is a historic and treacherous trans-Sierra Nevada railroad route in California, renowned for its steep grades, heavy snowfall, and vital role in westward rail transportation.
-
B.
Union Pacific Railroad line
The Union Pacific Railroad line is a major freight rail route in the western United States operated by Union Pacific Railroad, one of the largest railroad networks in North America.
-
C.
Southern Pacific Siskiyou and Shasta routes
The Southern Pacific Siskiyou and Shasta routes were mountainous mainlines in Oregon and Northern California known for their steep grades, dramatic scenery, and heavy steam locomotive operations.
-
D.
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.
-
E.
Southern Pacific main line in California’s Central Valley
The Southern Pacific main line in California’s Central Valley was a major north–south railroad corridor that formed the backbone of freight and passenger rail service through the state’s agricultural heartland.
- 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: Central Pacific line from Sacramento, California Triple: [Golden Spike ceremony, railroadEndpointWest, Central Pacific line from Sacramento, California]
Generated description
The Central Pacific line from Sacramento, California was the western segment of the first U.S. transcontinental railroad, built eastward over the Sierra Nevada to meet the Union Pacific line at Promontory Summit in 1869.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Central Pacific line from Sacramento, California Target entity description: The Central Pacific line from Sacramento, California was the western segment of the first U.S. transcontinental railroad, built eastward over the Sierra Nevada to meet the Union Pacific line at Promontory Summit in 1869.
-
A.
Southern Pacific Donner Pass line
The Southern Pacific Donner Pass line is a historic and treacherous trans-Sierra Nevada railroad route in California, renowned for its steep grades, heavy snowfall, and vital role in westward rail transportation.
-
B.
Union Pacific Railroad line
The Union Pacific Railroad line is a major freight rail route in the western United States operated by Union Pacific Railroad, one of the largest railroad networks in North America.
-
C.
Southern Pacific Siskiyou and Shasta routes
The Southern Pacific Siskiyou and Shasta routes were mountainous mainlines in Oregon and Northern California known for their steep grades, dramatic scenery, and heavy steam locomotive operations.
-
D.
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.
-
E.
Southern Pacific main line in California’s Central Valley
The Southern Pacific main line in California’s Central Valley was a major north–south railroad corridor that formed the backbone of freight and passenger rail service through the state’s agricultural heartland.
- F. None of above. chosen
PD
Predicate disambiguation
gpt-5-mini-2025-08-07
Target predicate: railroadEndpointWest Context triple: [Golden Spike ceremony, railroadEndpointWest, Central Pacific line from Sacramento, California]
-
A.
railroadTerminusFor
Indicates that one location serves as the end point or final station of a particular railroad line for another location.
-
B.
railroadMet
Indicates that two or more railroads encountered or connected with each other at a specific place or time.
-
C.
terminusWestNear
Indicates that the western terminus of one entity is located near the western terminus of another entity.
-
D.
terminusWestConnection
chosen
Indicates that one entity serves as the western endpoint where it connects to another entity or route.
-
E.
terminusCityWest
Indicates that a route, line, or service has its western terminus located in the specified city.
- F. None of above.
Provenance (6 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_69ca82dfad9c8190b8cd18fb89f50f40 |
completed | March 30, 2026, 2:04 p.m. |
| NER | Named-entity recognition | batch_69cb78f9f680819088f1d56e0f98974f |
completed | March 31, 2026, 7:34 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69cd3553b48881909cc72e443aad9539 |
completed | April 1, 2026, 3:10 p.m. |
| NEDg | Description generation | batch_69cd37a71af481909e82aa29ae558c4a |
completed | April 1, 2026, 3:20 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69cd4f0055dc8190803a7c412533aec4 |
completed | April 1, 2026, 4:59 p.m. |
| PD | Predicate disambiguation | batch_69cb36b6d5548190b665a6cce14c69f7 |
completed | March 31, 2026, 2:51 a.m. |
Created at: March 30, 2026, 5:48 p.m.