Triple

T11698692
Position Surface form Disambiguated ID Type / Status
Subject Northern Indiana Commuter Transportation District E278063 entity
Predicate regionServed P82 FINISHED
Object Indiana–Illinois commuter corridor
The Indiana–Illinois commuter corridor is a heavily traveled rail and highway route connecting communities in northern Indiana with the Chicago metropolitan area for daily commuting.
 E711102 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: Indiana–Illinois commuter corridor | Statement: [Northern Indiana Commuter Transportation District, regionServed, Indiana–Illinois commuter corridor]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Indiana–Illinois commuter corridor
Context triple: [Northern Indiana Commuter Transportation District, regionServed, Indiana–Illinois commuter corridor]
  • A. Chicago–Joliet corridor
    The Chicago–Joliet corridor is a major commuter and freight rail route in northeastern Illinois connecting the city of Chicago with the city of Joliet through multiple suburban communities.
  • B. Chicago–La Grange corridor
    The Chicago–La Grange corridor is a key suburban rail route west of Chicago that has long served as a major commuter link between the city and its western suburbs.
  • C. Chicago–Indianapolis corridor
    The Chicago–Indianapolis corridor is a major Midwestern transportation route linking the metropolitan hubs of Chicago, Illinois and Indianapolis, Indiana by highway and rail.
  • D. Chicago–St. Louis rail corridor
    The Chicago–St. Louis rail corridor is a major Midwestern passenger and freight rail route linking Chicago, Illinois, with St. Louis, Missouri, and serving as a key component of the region’s transportation network.
  • E. Chicago–Aurora corridor
    The Chicago–Aurora corridor is a heavily traveled suburban rail and commuter route linking downtown Chicago with the city of Aurora in Illinois.
  • 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: Indiana–Illinois commuter corridor
Triple: [Northern Indiana Commuter Transportation District, regionServed, Indiana–Illinois commuter corridor]
Generated description
The Indiana–Illinois commuter corridor is a heavily traveled rail and highway route connecting communities in northern Indiana with the Chicago metropolitan area for daily commuting.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Indiana–Illinois commuter corridor
Target entity description: The Indiana–Illinois commuter corridor is a heavily traveled rail and highway route connecting communities in northern Indiana with the Chicago metropolitan area for daily commuting.
  • A. Chicago–Joliet corridor
    The Chicago–Joliet corridor is a major commuter and freight rail route in northeastern Illinois connecting the city of Chicago with the city of Joliet through multiple suburban communities.
  • B. Chicago–La Grange corridor
    The Chicago–La Grange corridor is a key suburban rail route west of Chicago that has long served as a major commuter link between the city and its western suburbs.
  • C. Chicago–Indianapolis corridor chosen
    The Chicago–Indianapolis corridor is a major Midwestern transportation route linking the metropolitan hubs of Chicago, Illinois and Indianapolis, Indiana by highway and rail.
  • D. Chicago–St. Louis rail corridor
    The Chicago–St. Louis rail corridor is a major Midwestern passenger and freight rail route linking Chicago, Illinois, with St. Louis, Missouri, and serving as a key component of the region’s transportation network.
  • E. Chicago–Aurora corridor
    The Chicago–Aurora corridor is a heavily traveled suburban rail and commuter route linking downtown Chicago with the city of Aurora in Illinois.
  • F. None of above.

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_69d6aafe02d881909900d54ad7d4af84 completed April 8, 2026, 7:22 p.m.
NER Named-entity recognition batch_69d8a47df68c81908a91919a69b4880d completed April 10, 2026, 7:19 a.m.
NED1 Entity disambiguation (via context triple) batch_69ef147e2e10819085eaed83fd955b6b completed April 27, 2026, 7:47 a.m.
NEDg Description generation batch_69ef3553a1748190b554463bcea8bd1d completed April 27, 2026, 10:07 a.m.
NED2 Entity disambiguation (via description) batch_69ef51fe3824819099f440426d3e6888 completed April 27, 2026, 12:09 p.m.
Created at: April 8, 2026, 9:40 p.m.