Triple

T5613387
Position Surface form Disambiguated ID Type / Status
Subject Burlington Route commuter service E147416 entity
Predicate operatedOnLine P15252 FINISHED
Object Chicago–Aurora main line
The Chicago–Aurora main line is a key suburban rail corridor in the Chicago metropolitan area that historically linked downtown Chicago with the city of Aurora, Illinois.
 E150214 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: Chicago–Aurora main line | Statement: [Burlington Route commuter service, operatedOnLine, Chicago–Aurora main line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Chicago–Aurora main line
Context triple: [Burlington Route commuter service, operatedOnLine, Chicago–Aurora main line]
  • A. Chicago & North Western West Line
    The Chicago & North Western West Line was a historic commuter rail route in the Chicago area that later became part of Metra’s Union Pacific West Line.
  • B. Metra Rock Island District line
    The Metra Rock Island District line is a commuter rail route in the Chicago metropolitan area that connects downtown Chicago with various southwest suburbs, including Tinley Park.
  • C. Metra Heritage Corridor
    The Metra Heritage Corridor is a commuter rail line in the Chicago metropolitan area that provides weekday service between Chicago Union Station and Joliet, Illinois, largely following the historic Illinois & Michigan Canal corridor.
  • D. Chicago–Omaha main line
    The Chicago–Omaha main line was a principal transcontinental rail corridor in the Midwestern United States, linking Chicago with Omaha and serving as a key route for both passenger and freight traffic.
  • E. Metra Union Pacific North Line
    The Metra Union Pacific North Line is a commuter rail line in the Chicago metropolitan area that runs between downtown Chicago and its northern suburbs along the Union Pacific Railroad’s North Line.
  • 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: Chicago–Aurora main line
Triple: [Burlington Route commuter service, operatedOnLine, Chicago–Aurora main line]
Generated description
The Chicago–Aurora main line is a key suburban rail corridor in the Chicago metropolitan area that historically linked downtown Chicago with the city of Aurora, Illinois.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Chicago–Aurora main line
Target entity description: The Chicago–Aurora main line is a key suburban rail corridor in the Chicago metropolitan area that historically linked downtown Chicago with the city of Aurora, Illinois.
  • A. Chicago & North Western West Line chosen
    The Chicago & North Western West Line was a historic commuter rail route in the Chicago area that later became part of Metra’s Union Pacific West Line.
  • B. Metra Rock Island District line
    The Metra Rock Island District line is a commuter rail route in the Chicago metropolitan area that connects downtown Chicago with various southwest suburbs, including Tinley Park.
  • C. Metra Heritage Corridor
    The Metra Heritage Corridor is a commuter rail line in the Chicago metropolitan area that provides weekday service between Chicago Union Station and Joliet, Illinois, largely following the historic Illinois & Michigan Canal corridor.
  • D. Chicago–Omaha main line
    The Chicago–Omaha main line was a principal transcontinental rail corridor in the Midwestern United States, linking Chicago with Omaha and serving as a key route for both passenger and freight traffic.
  • E. Metra Union Pacific North Line
    The Metra Union Pacific North Line is a commuter rail line in the Chicago metropolitan area that runs between downtown Chicago and its northern suburbs along the Union Pacific Railroad’s North Line.
  • 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_69c00905d4588190bd967842bbcf2219 completed March 22, 2026, 3:21 p.m.
NER Named-entity recognition batch_69c021226cf88190b70b4b51eb5b4144 completed March 22, 2026, 5:04 p.m.
NED1 Entity disambiguation (via context triple) batch_69c0287b14708190bc246e982896ad27 completed March 22, 2026, 5:35 p.m.
NEDg Description generation batch_69c03f8c1a3081908f9d03a6c51d69f0 completed March 22, 2026, 7:14 p.m.
NED2 Entity disambiguation (via description) batch_69c0404f0a3081908850794f9a5cea40 completed March 22, 2026, 7:17 p.m.
Created at: March 22, 2026, 3:39 p.m.