Triple

T2474337
Position Surface form Disambiguated ID Type / Status
Subject MARC Brunswick Line E55051 entity
Predicate usesRailwayLine P15040 FINISHED
Object CSX Transportation Cumberland Subdivision
CSX Transportation's Cumberland Subdivision is a major freight rail line running through Maryland and West Virginia that also hosts MARC commuter rail service on the Brunswick Line.
 E271553 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: CSX Transportation Cumberland Subdivision | Statement: [MARC Brunswick Line, usesRailwayLine, CSX Transportation Cumberland Subdivision]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: CSX Transportation Cumberland Subdivision
Context triple: [MARC Brunswick Line, usesRailwayLine, CSX Transportation Cumberland Subdivision]
  • A. CSX Capital Subdivision
    CSX Capital Subdivision is a CSX Transportation rail line in Maryland that serves as a key freight and commuter corridor between Washington, D.C., and Baltimore.
  • B. CSX RF&P Subdivision
    The CSX RF&P Subdivision is a major CSX Transportation rail line in Virginia that forms part of the busy freight and passenger corridor linking Washington, D.C. with Richmond and points south.
  • C. CSX Trenton Subdivision
    The CSX Trenton Subdivision is a freight rail line in the northeastern United States operated by CSX Transportation, forming part of a major corridor between Philadelphia and North Jersey.
  • D. CSX Transportation Metropolitan Subdivision
    The CSX Transportation Metropolitan Subdivision is a major freight and passenger rail corridor in Maryland and the Washington, D.C. area, forming part of CSX's network and hosting MARC commuter rail service.
  • E. Baltimore and Susquehanna Railroad
    The Baltimore and Susquehanna Railroad was an early 19th-century American railroad that helped pioneer rail transportation in Maryland and Pennsylvania, eventually becoming part of the Northern Central Railway system.
  • 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: CSX Transportation Cumberland Subdivision
Triple: [MARC Brunswick Line, usesRailwayLine, CSX Transportation Cumberland Subdivision]
Generated description
CSX Transportation's Cumberland Subdivision is a major freight rail line running through Maryland and West Virginia that also hosts MARC commuter rail service on the Brunswick Line.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: CSX Transportation Cumberland Subdivision
Target entity description: CSX Transportation's Cumberland Subdivision is a major freight rail line running through Maryland and West Virginia that also hosts MARC commuter rail service on the Brunswick Line.
  • A. CSX Capital Subdivision
    CSX Capital Subdivision is a CSX Transportation rail line in Maryland that serves as a key freight and commuter corridor between Washington, D.C., and Baltimore.
  • B. CSX RF&P Subdivision
    The CSX RF&P Subdivision is a major CSX Transportation rail line in Virginia that forms part of the busy freight and passenger corridor linking Washington, D.C. with Richmond and points south.
  • C. CSX Trenton Subdivision
    The CSX Trenton Subdivision is a freight rail line in the northeastern United States operated by CSX Transportation, forming part of a major corridor between Philadelphia and North Jersey.
  • D. CSX Transportation Metropolitan Subdivision
    The CSX Transportation Metropolitan Subdivision is a major freight and passenger rail corridor in Maryland and the Washington, D.C. area, forming part of CSX's network and hosting MARC commuter rail service.
  • E. Baltimore and Susquehanna Railroad
    The Baltimore and Susquehanna Railroad was an early 19th-century American railroad that helped pioneer rail transportation in Maryland and Pennsylvania, eventually becoming part of the Northern Central Railway system.
  • 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_69ab49e279e88190ab10d7248aea9d11 completed March 6, 2026, 9:40 p.m.
NER Named-entity recognition batch_69abd14b725c81908256c4d3bb6c5173 completed March 7, 2026, 7:18 a.m.
NED1 Entity disambiguation (via context triple) batch_69af1f8990488190bc54cc5eadf11baa completed March 9, 2026, 7:29 p.m.
NEDg Description generation batch_69af1fe9eecc8190b5f3e15bde5239b4 completed March 9, 2026, 7:30 p.m.
NED2 Entity disambiguation (via description) batch_69af204da9c88190a59155f04a214b8d completed March 9, 2026, 7:32 p.m.
Created at: March 6, 2026, 9:45 p.m.