Triple

T5151266
Position Surface form Disambiguated ID Type / Status
Subject Sofia–Kulata railway line E116198 entity
Predicate operator P179 FINISHED
Object Bulgarian State Railways
Bulgarian State Railways is Bulgaria’s national railway company, responsible for operating the country’s passenger and freight train services.
 E496983 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: Bulgarian State Railways | Statement: [Sofia–Kulata railway line, operator, Bulgarian State Railways]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Bulgarian State Railways
Context triple: [Sofia–Kulata railway line, operator, Bulgarian State Railways]
  • A. Czech Railways
    Czech Railways is the state-owned national railway operator of the Czech Republic, providing passenger and freight rail services across the country and internationally.
  • B. Russian Railways
    Russian Railways is Russia’s state-owned national railway company, operating the country’s extensive passenger and freight rail network across its vast territory.
  • C. Turkish State Railways
    Turkish State Railways is Turkey’s national railway company, responsible for operating and maintaining the country’s rail transport network, including high-speed train services.
  • D. Rail Cargo Group
    Rail Cargo Group is the freight transport and logistics division of the Austrian Federal Railways (ÖBB), providing rail-based cargo services across Europe.
  • E. RZD International
    RZD International is a global engineering and infrastructure subsidiary of Russian Railways that focuses on railway construction and modernization projects outside Russia.
  • 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: Bulgarian State Railways
Triple: [Sofia–Kulata railway line, operator, Bulgarian State Railways]
Generated description
Bulgarian State Railways is Bulgaria’s national railway company, responsible for operating the country’s passenger and freight train services.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Bulgarian State Railways
Target entity description: Bulgarian State Railways is Bulgaria’s national railway company, responsible for operating the country’s passenger and freight train services.
  • A. Czech Railways
    Czech Railways is the state-owned national railway operator of the Czech Republic, providing passenger and freight rail services across the country and internationally.
  • B. Russian Railways
    Russian Railways is Russia’s state-owned national railway company, operating the country’s extensive passenger and freight rail network across its vast territory.
  • C. Turkish State Railways
    Turkish State Railways is Turkey’s national railway company, responsible for operating and maintaining the country’s rail transport network, including high-speed train services.
  • D. Rail Cargo Group
    Rail Cargo Group is the freight transport and logistics division of the Austrian Federal Railways (ÖBB), providing rail-based cargo services across Europe.
  • E. RZD International
    RZD International is a global engineering and infrastructure subsidiary of Russian Railways that focuses on railway construction and modernization projects outside Russia.
  • 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_69bd445d94788190b72e2cc563120995 completed March 20, 2026, 12:58 p.m.
NER Named-entity recognition batch_69bd78d965548190b09f574acf3b9b1a completed March 20, 2026, 4:42 p.m.
NED1 Entity disambiguation (via context triple) batch_69bed004538c81908fac258ea99f7e63 completed March 21, 2026, 5:06 p.m.
NEDg Description generation batch_69bed07d478c8190aac215cb05bedae0 completed March 21, 2026, 5:08 p.m.
NED2 Entity disambiguation (via description) batch_69bed0d56af481908a3fb0693f151fb3 completed March 21, 2026, 5:09 p.m.
Created at: March 20, 2026, 1:44 p.m.