Triple

T10566840
Position Surface form Disambiguated ID Type / Status
Subject Homewood station E249371 entity
Predicate formerRailLine P30332 FINISHED
Object Illinois Central Railroad main line
The Illinois Central Railroad main line was a major north–south rail corridor in the central United States, historically linking Chicago with the Gulf of Mexico and serving as a key route for both passenger and freight traffic.
 E872896 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: Illinois Central Railroad main line | Statement: [Homewood station, formerRailLine, Illinois Central Railroad main line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Illinois Central Railroad main line
Context triple: [Homewood station, formerRailLine, Illinois Central Railroad main line]
  • A. Rock Island District main line
    The Rock Island District main line is a primary Metra commuter rail route in the Chicago area, running between downtown Chicago and its southwestern suburbs.
  • B. 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.
  • C. 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.
  • D. 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.
  • E. 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.
  • 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: Illinois Central Railroad main line
Triple: [Homewood station, formerRailLine, Illinois Central Railroad main line]
Generated description
The Illinois Central Railroad main line was a major north–south rail corridor in the central United States, historically linking Chicago with the Gulf of Mexico and serving as a key route for both passenger and freight traffic.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Illinois Central Railroad main line
Target entity description: The Illinois Central Railroad main line was a major north–south rail corridor in the central United States, historically linking Chicago with the Gulf of Mexico and serving as a key route for both passenger and freight traffic.
  • A. Rock Island District main line
    The Rock Island District main line is a primary Metra commuter rail route in the Chicago area, running between downtown Chicago and its southwestern suburbs.
  • B. 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.
  • C. 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.
  • D. 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.
  • E. 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.
  • 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_69d381c8bd708190acf3d275c908251e completed April 6, 2026, 9:50 a.m.
NER Named-entity recognition batch_69d5272ef5848190b76d671ea2d26314 completed April 7, 2026, 3:47 p.m.
NED1 Entity disambiguation (via context triple) batch_69d94b42879481909f9c98b2579c10a1 completed April 10, 2026, 7:10 p.m.
NEDg Description generation batch_69d94d67e16481908efb939a3e65004c completed April 10, 2026, 7:20 p.m.
NED2 Entity disambiguation (via description) batch_69d95227a1f48190ab847606a9ae0500 completed April 10, 2026, 7:40 p.m.
Created at: April 6, 2026, 12:36 p.m.