Central Pacific line from Sacramento, California
E721090
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Central Pacific Railroad line | 1 |
| Central Pacific line from Sacramento, California canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8255203 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
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.
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
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
railway line
ⓘ
segment of the First Transcontinental Railroad ⓘ |
| builtBy | Central Pacific Railroad Company of California NERFINISHED ⓘ |
| connectedTo | Union Pacific main line at Promontory Summit NERFINISHED ⓘ |
| constructionBegan | 1863 ⓘ |
| constructionDirection | eastward ⓘ |
| country | United States of America ⓘ |
| crosses | American River NERFINISHED ⓘ |
| currentOperator | Union Pacific Railroad (successor to Southern Pacific) NERFINISHED ⓘ |
| currentUse | freight rail corridor on much of its original alignment ⓘ |
| dateOfSignificantEvent | 1869-05-10 ⓘ |
| endPoint | Promontory Summit, Utah Territory NERFINISHED ⓘ |
| engineeringChallenge | heavy snowfall in the Sierra Nevada ⓘ |
| engineeringSolution | extensive snow sheds in the Sierra Nevada ⓘ |
| fundedBy | Pacific Railroad Act of 1862 NERFINISHED ⓘ |
| gauge | standard gauge ⓘ |
| granted |
federal construction subsidies
ⓘ
federal land grants ⓘ |
| historicalDesignation |
part of a National Historic Civil Engineering Landmark
ⓘ
part of a National Historic Landmark District at Promontory Summit ⓘ |
| historicalRole | western segment of the first rail link between the U.S. Pacific and Atlantic coasts ⓘ |
| laterBecamePartOf | Southern Pacific Overland Route NERFINISHED ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
Nevada ⓘ Utah Territory NERFINISHED ⓘ |
| metWith | Union Pacific Railroad line at Promontory Summit NERFINISHED ⓘ |
| notablePass | Donner Pass NERFINISHED ⓘ |
| notableStructure | Summit Tunnel (Tunnel No. 6) in the Sierra Nevada NERFINISHED ⓘ |
| operator | Central Pacific Railroad NERFINISHED ⓘ |
| partOf | First Transcontinental Railroad NERFINISHED ⓘ |
| passesThrough |
Auburn, California
NERFINISHED
ⓘ
Battle Mountain, Nevada NERFINISHED ⓘ Carlin, Nevada NERFINISHED ⓘ Colfax, California NERFINISHED ⓘ Elko, Nevada NERFINISHED ⓘ Great Basin NERFINISHED ⓘ Humboldt River valley NERFINISHED ⓘ Reno, Nevada NERFINISHED ⓘ Truckee, California NERFINISHED ⓘ Wadsworth, Nevada NERFINISHED ⓘ Winnemucca, Nevada NERFINISHED ⓘ |
| significantEvent | completion of first U.S. transcontinental railroad ⓘ |
| startPoint | Sacramento, California NERFINISHED ⓘ |
| successorOperator | Southern Pacific Railroad NERFINISHED ⓘ |
| traverses | Sierra Nevada NERFINISHED ⓘ |
| usedLaborFrom |
Chinese immigrant workers
ⓘ
Civil War veterans ⓘ Irish immigrant workers ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Central Pacific line from Sacramento, California Description of subject: 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.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Central Pacific Railroad line