Triple

T1742205
Position Surface form Disambiguated ID Type / Status
Subject First Transcontinental Railroad E38256 entity
Predicate notableStructure P1544 FINISHED
Object Summit Tunnel in the Sierra Nevada
Summit Tunnel in the Sierra Nevada is a historic railroad tunnel blasted through solid granite high in California’s Sierra Nevada mountains as part of the construction of the First Transcontinental Railroad in the 1860s.
 E193054 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: Summit Tunnel in the Sierra Nevada | Statement: [First Transcontinental Railroad, notableStructure, Summit Tunnel in the Sierra Nevada]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Summit Tunnel in the Sierra Nevada
Context triple: [First Transcontinental Railroad, notableStructure, Summit Tunnel in the Sierra Nevada]
  • A. Sierra Nevada transportation corridor
    The Sierra Nevada transportation corridor is a major east–west route across California’s Sierra Nevada mountains that carries key highway and rail lines linking the state’s Central Valley with Nevada and the broader interior West.
  • B. Tioga Pass corridor (eastern approach to Yosemite)
    The Tioga Pass corridor is a high-elevation scenic route on the eastern approach to Yosemite National Park, known for its dramatic Sierra Nevada landscapes, alpine lakes, and access to hiking and climbing areas.
  • C. Ebbetts Pass
    Ebbetts Pass is a high mountain pass in California’s Sierra Nevada, known for its scenic, winding route and historic role as a trans-Sierra crossing.
  • D. Tehachapi Pass
    Tehachapi Pass is a major mountain pass in Southern California that serves as a key transportation corridor between the San Joaquin Valley and the Mojave Desert.
  • E. Carson Pass
    Carson Pass is a high mountain pass in California’s central Sierra Nevada, known for its scenic alpine landscapes, hiking trails, and historic role as a route for emigrant wagon trains.
  • 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: Summit Tunnel in the Sierra Nevada
Triple: [First Transcontinental Railroad, notableStructure, Summit Tunnel in the Sierra Nevada]
Generated description
Summit Tunnel in the Sierra Nevada is a historic railroad tunnel blasted through solid granite high in California’s Sierra Nevada mountains as part of the construction of the First Transcontinental Railroad in the 1860s.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Summit Tunnel in the Sierra Nevada
Target entity description: Summit Tunnel in the Sierra Nevada is a historic railroad tunnel blasted through solid granite high in California’s Sierra Nevada mountains as part of the construction of the First Transcontinental Railroad in the 1860s.
  • A. Sierra Nevada transportation corridor
    The Sierra Nevada transportation corridor is a major east–west route across California’s Sierra Nevada mountains that carries key highway and rail lines linking the state’s Central Valley with Nevada and the broader interior West.
  • B. Tioga Pass corridor (eastern approach to Yosemite)
    The Tioga Pass corridor is a high-elevation scenic route on the eastern approach to Yosemite National Park, known for its dramatic Sierra Nevada landscapes, alpine lakes, and access to hiking and climbing areas.
  • C. Ebbetts Pass
    Ebbetts Pass is a high mountain pass in California’s Sierra Nevada, known for its scenic, winding route and historic role as a trans-Sierra crossing.
  • D. Tehachapi Pass
    Tehachapi Pass is a major mountain pass in Southern California that serves as a key transportation corridor between the San Joaquin Valley and the Mojave Desert.
  • E. Carson Pass
    Carson Pass is a high mountain pass in California’s central Sierra Nevada, known for its scenic alpine landscapes, hiking trails, and historic role as a route for emigrant wagon trains.
  • 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_69a8862b01a48190ab47209063af82d9 completed March 4, 2026, 7:21 p.m.
NER Named-entity recognition batch_69aa63c6d21c8190809bedaa798e2b14 completed March 6, 2026, 5:19 a.m.
NED1 Entity disambiguation (via context triple) batch_69ad8b0ab7008190a2fafe1c8ac55ac4 completed March 8, 2026, 2:43 p.m.
NEDg Description generation batch_69ad957f64c48190862a701a94098bbf completed March 8, 2026, 3:27 p.m.
NED2 Entity disambiguation (via description) batch_69ad97b974708190adfffebee41a6fcd completed March 8, 2026, 3:37 p.m.
Created at: March 4, 2026, 7:30 p.m.