Triple

T7510719
Position Surface form Disambiguated ID Type / Status
Subject Kennecott Mines National Historic Landmark E177510 entity
Predicate transportLinkedBy P37664 FINISHED
Object Copper River and Northwestern Railway
The Copper River and Northwestern Railway was an early 20th-century Alaskan railroad built primarily to haul copper ore from the remote Kennecott mines to the coastal port of Cordova.
E669927 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: Copper River and Northwestern Railway | Statement: [Kennecott Mines National Historic Landmark, transportLinkedBy, Copper River and Northwestern Railway]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Copper River and Northwestern Railway
Context triple: [Kennecott Mines National Historic Landmark, transportLinkedBy, Copper River and Northwestern Railway]
  • A. Alaska Northern Railway
    The Alaska Northern Railway was an early 20th-century rail line in Alaska that laid much of the groundwork for what later became the Alaska Railroad.
  • B. Alaska Railroad
    The Alaska Railroad is a state-owned railway system in Alaska that provides passenger and freight services across key regions including Anchorage, Fairbanks, and coastal ports.
  • C. Northern Pacific Railway
    The Northern Pacific Railway was a major transcontinental railroad in the northern United States that played a key role in opening and developing the Pacific Northwest in the late 19th and early 20th centuries.
  • D. Northern Pacific
    The Northern Pacific is the northern portion of the Pacific Ocean, encompassing vast open waters and numerous island groups and archipelagos across the Northern Hemisphere.
  • E. Spokane, Portland and Seattle Railway
    The Spokane, Portland and Seattle Railway was an early 20th-century Pacific Northwest railroad line, backed by railroad magnate James J. Hill, that connected key cities along the Columbia River and facilitated regional trade and transportation.
  • 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: Copper River and Northwestern Railway
Triple: [Kennecott Mines National Historic Landmark, transportLinkedBy, Copper River and Northwestern Railway]
Generated description
The Copper River and Northwestern Railway was an early 20th-century Alaskan railroad built primarily to haul copper ore from the remote Kennecott mines to the coastal port of Cordova.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Copper River and Northwestern Railway
Target entity description: The Copper River and Northwestern Railway was an early 20th-century Alaskan railroad built primarily to haul copper ore from the remote Kennecott mines to the coastal port of Cordova.
  • A. Alaska Northern Railway
    The Alaska Northern Railway was an early 20th-century rail line in Alaska that laid much of the groundwork for what later became the Alaska Railroad.
  • B. Alaska Railroad
    The Alaska Railroad is a state-owned railway system in Alaska that provides passenger and freight services across key regions including Anchorage, Fairbanks, and coastal ports.
  • C. Northern Pacific Railway
    The Northern Pacific Railway was a major transcontinental railroad in the northern United States that played a key role in opening and developing the Pacific Northwest in the late 19th and early 20th centuries.
  • D. Northern Pacific
    The Northern Pacific is the northern portion of the Pacific Ocean, encompassing vast open waters and numerous island groups and archipelagos across the Northern Hemisphere.
  • E. Spokane, Portland and Seattle Railway
    The Spokane, Portland and Seattle Railway was an early 20th-century Pacific Northwest railroad line, backed by railroad magnate James J. Hill, that connected key cities along the Columbia River and facilitated regional trade and transportation.
  • F. None of above. chosen
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: transportLinkedBy
Context triple: [Kennecott Mines National Historic Landmark, transportLinkedBy, Copper River and Northwestern Railway]
  • A. hasTransportationRelation
    Indicates a relationship in which one entity provides, uses, is connected by, or is otherwise associated with a means or mode of transportation to another entity or location.
  • B. transportInterface
    Indicates a relationship where one entity serves as the medium or mechanism through which another entity is transported or conveyed.
  • C. transportHubType
    Indicates the specific category or kind of transport hub associated with an entity (e.g., airport, train station, bus terminal).
  • D. transportFrom
    Indicates that something or someone is moved or carried away starting from a specified origin location.
  • E. transportConnectionTo chosen
    Indicates a relationship where one entity provides or participates in a means of transportation that connects or leads to another entity.
  • 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_69c69f276b108190af2cc790b6554544 completed March 27, 2026, 3:15 p.m.
NER Named-entity recognition batch_69c6f5d1e1a4819090bf4cbacdbdc7d0 completed March 27, 2026, 9:25 p.m.
NED1 Entity disambiguation (via context triple) batch_69c84614e8608190b6d683e4402a6275 completed March 28, 2026, 9:20 p.m.
NEDg Description generation batch_69c847380f08819082d96a4a8e3143a4 completed March 28, 2026, 9:25 p.m.
NED2 Entity disambiguation (via description) batch_69c847b5787c81908bfe5b71a1494b54 completed March 28, 2026, 9:27 p.m.
PD Predicate disambiguation batch_69c6f4d44e9481909813e073b194f6f4 completed March 27, 2026, 9:21 p.m.
Created at: March 27, 2026, 3:45 p.m.