Triple

T18248343
Position Surface form Disambiguated ID Type / Status
Subject CTA 2200-series railcars E437012 entity
Predicate usedOnLine P15252 FINISHED
Object Lake-Dan Ryan service (early years) — NE NERFINISHED

How this triple was built (3 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: Lake-Dan Ryan service (early years) | Statement: [CTA 2200-series railcars, usedOnLine, Lake-Dan Ryan service (early years)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Lake-Dan Ryan service (early years)
Context triple: [CTA 2200-series railcars, usedOnLine, Lake-Dan Ryan service (early years)]
  • A. Ryan Lake
    Ryan Lake is a small recreational lake located in the city of Robbinsdale, Minnesota.
  • B. Green Line Lake Branch
    The Green Line Lake Branch is a rapid transit line of the Chicago "L" system that runs west from downtown Chicago to the city's West Side and western suburbs.
  • C. Hamilton Lakes
    Hamilton Lakes are a pair of scenic alpine lakes in California’s Sequoia National Park, popular with backpackers for their dramatic granite surroundings and clear mountain waters.
  • D. Todd Lake
    Todd Lake is a scenic alpine lake in central Oregon’s Cascade Range, popular for hiking, fishing, and wildflower viewing.
  • E. Lakeshore
    Lakeshore is a town in southwestern Ontario, Canada, situated along the shores of Lake St. Clair just east of Windsor.
  • 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: Lake-Dan Ryan service (early years)
Target entity description: Lake-Dan Ryan service (early years) was an early configuration of Chicago's 'L' rapid transit operations that combined the Lake Street and Dan Ryan branches into a through-routed line.
  • A. Ryan Lake
    Ryan Lake is a small recreational lake located in the city of Robbinsdale, Minnesota.
  • B. Green Line Lake Branch
    The Green Line Lake Branch is a rapid transit line of the Chicago "L" system that runs west from downtown Chicago to the city's West Side and western suburbs.
  • C. Hamilton Lakes
    Hamilton Lakes are a pair of scenic alpine lakes in California’s Sequoia National Park, popular with backpackers for their dramatic granite surroundings and clear mountain waters.
  • D. Todd Lake
    Todd Lake is a scenic alpine lake in central Oregon’s Cascade Range, popular for hiking, fishing, and wildflower viewing.
  • E. Lakeshore
    Lakeshore is a town in southwestern Ontario, Canada, situated along the shores of Lake St. Clair just east of Windsor.
  • F. None of above. chosen

Provenance (2 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_69d8b91104e08190a8241f7d260a5162 completed April 10, 2026, 8:47 a.m.
NER Named-entity recognition batch_69e4f7e89b288190a286797ec2cd60a8 completed April 19, 2026, 3:42 p.m.
Created at: April 10, 2026, 10:33 a.m.