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.