Triple

T11698717
Position Surface form Disambiguated ID Type / Status
Subject Chicago South Shore and South Bend Railroad E278064 entity
Predicate freightOperationsManagedBy P52071 FINISHED
Object Anacostia Rail Holdings
Anacostia Rail Holdings is a U.S.-based company that owns and operates short-line and regional freight railroads across several states.
E939693 NE FINISHED

How this triple was built (5 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: Anacostia Rail Holdings | Statement: [Chicago South Shore and South Bend Railroad, freightOperationsManagedBy, Anacostia Rail Holdings]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Anacostia Rail Holdings
Context triple: [Chicago South Shore and South Bend Railroad, freightOperationsManagedBy, Anacostia Rail Holdings]
  • A. Baltimore & Potomac Railroad
    The Baltimore & Potomac Railroad was a 19th-century rail line that connected Baltimore to Washington, D.C., later becoming part of the Pennsylvania Railroad system.
  • B. CIT Rail
    CIT Rail is a railcar leasing and financing company that provides rail transportation equipment and related services to shippers and railroads.
  • C. Tidewater Southern Railway
    Tidewater Southern Railway was a shortline railroad in California’s San Joaquin Valley that primarily handled agricultural and freight traffic and later became part of the Western Pacific Railroad system.
  • D. Norfolk Southern Hagerstown District
    The Norfolk Southern Hagerstown District is a freight rail line in the eastern United States operated by Norfolk Southern Railway, connecting key points in the Mid-Atlantic region including areas around Hagerstown, Maryland.
  • E. Potomac and Rappahannock Transportation Commission
    The Potomac and Rappahannock Transportation Commission is a regional transit agency in Northern Virginia that oversees and funds commuter rail and bus services for member jurisdictions south of Washington, D.C.
  • 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: Anacostia Rail Holdings
Triple: [Chicago South Shore and South Bend Railroad, freightOperationsManagedBy, Anacostia Rail Holdings]
Generated description
Anacostia Rail Holdings is a U.S.-based company that owns and operates short-line and regional freight railroads across several states.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Anacostia Rail Holdings
Target entity description: Anacostia Rail Holdings is a U.S.-based company that owns and operates short-line and regional freight railroads across several states.
  • A. Baltimore & Potomac Railroad
    The Baltimore & Potomac Railroad was a 19th-century rail line that connected Baltimore to Washington, D.C., later becoming part of the Pennsylvania Railroad system.
  • B. CIT Rail
    CIT Rail is a railcar leasing and financing company that provides rail transportation equipment and related services to shippers and railroads.
  • C. Tidewater Southern Railway
    Tidewater Southern Railway was a shortline railroad in California’s San Joaquin Valley that primarily handled agricultural and freight traffic and later became part of the Western Pacific Railroad system.
  • D. Norfolk Southern Hagerstown District
    The Norfolk Southern Hagerstown District is a freight rail line in the eastern United States operated by Norfolk Southern Railway, connecting key points in the Mid-Atlantic region including areas around Hagerstown, Maryland.
  • E. Potomac and Rappahannock Transportation Commission
    The Potomac and Rappahannock Transportation Commission is a regional transit agency in Northern Virginia that oversees and funds commuter rail and bus services for member jurisdictions south of Washington, D.C.
  • F. None of above. chosen
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: freightOperationsManagedBy
Context triple: [Chicago South Shore and South Bend Railroad, freightOperationsManagedBy, Anacostia Rail Holdings]
  • A. freightOperatorOnCorridor
    Indicates that a particular freight operator provides services or operates along a specified transport corridor.
  • B. servesAsCargoHubFor
    Indicates that one entity functions as a central location or facility for handling, consolidating, and distributing cargo associated with another entity.
  • C. oftenOperatedBy
    Indicates that an entity is frequently or typically operated, controlled, or run by another entity.
  • D. primaryCargoOperator chosen
    Indicates that an entity serves as the main organization responsible for operating or managing the cargo-related activities of another entity.
  • E. operatedOnRailroad
    Indicates that an entity conducted operations or provided services on a railroad system.
  • F. None of above.

Provenance (6 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.
PD Predicate disambiguation batch_69d88a7b30948190b616a9db5c5488d5 completed April 10, 2026, 5:28 a.m.
Created at: April 8, 2026, 9:40 p.m.