Triple

T9285517
Position Surface form Disambiguated ID Type / Status
Subject Northwestern Pacific Railroad E223383 entity
Predicate formedByMergerOf P77 FINISHED
Object San Francisco and North Pacific Railroad
The San Francisco and North Pacific Railroad was a 19th-century regional railroad in Northern California that later became a key predecessor of the Northwestern Pacific Railroad.
E789371 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: San Francisco and North Pacific Railroad | Statement: [Northwestern Pacific Railroad, formedByMergerOf, San Francisco and North Pacific Railroad]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: San Francisco and North Pacific Railroad
Context triple: [Northwestern Pacific Railroad, formedByMergerOf, San Francisco and North Pacific Railroad]
  • A. Southern Pacific Railroad
    Southern Pacific Railroad was a major American railroad company that operated extensive rail networks across the western and southwestern United States from the 19th to the late 20th century.
  • B. Central Pacific Railroad
    The Central Pacific Railroad was a major 19th-century American railroad company that built the western portion of the First Transcontinental Railroad, linking California to the eastern United States and transforming transportation and commerce.
  • C. Union Pacific City of San Francisco
    Union Pacific City of San Francisco was a premier streamlined passenger train that operated between Chicago and San Francisco, known for its luxury amenities and scenic transcontinental route.
  • D. Sacramento Northern Railway
    The Sacramento Northern Railway was an interurban electric railway in Northern California that connected the San Francisco Bay Area with the Sacramento Valley and was later controlled by the Western Pacific Railroad.
  • E. Oregon and California Railroad
    The Oregon and California Railroad was a 19th-century rail line in the Pacific Northwest that played a key role in connecting Oregon communities and facilitating regional development.
  • 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: San Francisco and North Pacific Railroad
Triple: [Northwestern Pacific Railroad, formedByMergerOf, San Francisco and North Pacific Railroad]
Generated description
The San Francisco and North Pacific Railroad was a 19th-century regional railroad in Northern California that later became a key predecessor of the Northwestern Pacific Railroad.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: San Francisco and North Pacific Railroad
Target entity description: The San Francisco and North Pacific Railroad was a 19th-century regional railroad in Northern California that later became a key predecessor of the Northwestern Pacific Railroad.
  • A. Southern Pacific Railroad
    Southern Pacific Railroad was a major American railroad company that operated extensive rail networks across the western and southwestern United States from the 19th to the late 20th century.
  • B. Central Pacific Railroad
    The Central Pacific Railroad was a major 19th-century American railroad company that built the western portion of the First Transcontinental Railroad, linking California to the eastern United States and transforming transportation and commerce.
  • C. Union Pacific City of San Francisco
    Union Pacific City of San Francisco was a premier streamlined passenger train that operated between Chicago and San Francisco, known for its luxury amenities and scenic transcontinental route.
  • D. Sacramento Northern Railway
    The Sacramento Northern Railway was an interurban electric railway in Northern California that connected the San Francisco Bay Area with the Sacramento Valley and was later controlled by the Western Pacific Railroad.
  • E. Oregon and California Railroad
    The Oregon and California Railroad was a 19th-century rail line in the Pacific Northwest that played a key role in connecting Oregon communities and facilitating regional development.
  • 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_69ca8422ddf881908a3f8f876c9f53aa completed March 30, 2026, 2:09 p.m.
NER Named-entity recognition batch_69cd081fe8cc8190b6c1b481c7129689 completed April 1, 2026, 11:57 a.m.
NED1 Entity disambiguation (via context triple) batch_69d0b21d8f1081909b2493151fde4a5f completed April 4, 2026, 6:39 a.m.
NEDg Description generation batch_69d0b3234d088190a8ed13b4d4772fb5 completed April 4, 2026, 6:43 a.m.
NED2 Entity disambiguation (via description) batch_69d0b3bcd5548190ba1af3d0fa72780a completed April 4, 2026, 6:46 a.m.
Created at: March 30, 2026, 7:35 p.m.