Triple

T15807074
Position Surface form Disambiguated ID Type / Status
Subject Central Park station E383245 entity
Predicate formerLine P32801 FINISHED
Object Douglas branch
The Douglas branch was a former elevated rapid transit line in Chicago that once served as part of the city's "L" system.
 E1177784 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: Douglas branch | Statement: [Central Park station, formerLine, Douglas branch]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Douglas branch
Context triple: [Central Park station, formerLine, Douglas branch]
  • A. Red Douglas branch
    The Red Douglas branch was a powerful cadet line of the medieval Scottish Douglas family, distinguished from the senior “Black Douglas” line and prominent in late medieval Scottish politics.
  • B. Preston Branch
    Preston Branch is a short offshoot of England’s Lancaster Canal that was built to provide a navigable link to the city of Preston.
  • C. Gladstone Branch
    The Gladstone Branch is a commuter rail line in New Jersey that provides service between Gladstone and Hoboken/New York as part of NJ Transit's Morris & Essex Lines network.
  • D. Porter Branch
    Porter Branch is a local public library facility that serves as one of the community branches of the Central Rappahannock Regional Library system.
  • E. Highland Branch
    Highland Branch is a light rail line of Boston's MBTA Green Line that runs through several western suburbs including Newton.
  • 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: Douglas branch
Triple: [Central Park station, formerLine, Douglas branch]
Generated description
The Douglas branch was a former elevated rapid transit line in Chicago that once served as part of the city's "L" system.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Douglas branch
Target entity description: The Douglas branch was a former elevated rapid transit line in Chicago that once served as part of the city's "L" system.
  • A. Red Douglas branch
    The Red Douglas branch was a powerful cadet line of the medieval Scottish Douglas family, distinguished from the senior “Black Douglas” line and prominent in late medieval Scottish politics.
  • B. Preston Branch
    Preston Branch is a short offshoot of England’s Lancaster Canal that was built to provide a navigable link to the city of Preston.
  • C. Gladstone Branch
    The Gladstone Branch is a commuter rail line in New Jersey that provides service between Gladstone and Hoboken/New York as part of NJ Transit's Morris & Essex Lines network.
  • D. Porter Branch
    Porter Branch is a local public library facility that serves as one of the community branches of the Central Rappahannock Regional Library system.
  • E. Highland Branch
    Highland Branch is a light rail line of Boston's MBTA Green Line that runs through several western suburbs including Newton.
  • 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_69d86da2858c819090cc8481e7207b6e completed April 10, 2026, 3:25 a.m.
NER Named-entity recognition batch_69e0b52751348190964e82463ce9dd20 completed April 16, 2026, 10:08 a.m.
NED1 Entity disambiguation (via context triple) batch_69ff998fa5588190b28efc2f342405aa completed May 9, 2026, 8:31 p.m.
NEDg Description generation batch_69ff9a32d6bc81909d8023de562a2517 completed May 9, 2026, 8:33 p.m.
NED2 Entity disambiguation (via description) batch_69ff9adb25448190b805046ae6c3ee17 completed May 9, 2026, 8:36 p.m.
Created at: April 10, 2026, 4:48 a.m.