Triple

T20368606
Position Surface form Disambiguated ID Type / Status
Subject Bulgarian State Railways E496983 entity
Predicate operatesRoute P3695 FINISHED
Object Sofia–Vidin
Sofia–Vidin is a Bulgarian railway route connecting the capital city Sofia with the northwestern city of Vidin near the Danube River and the Romanian border.
 E1475542 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: Sofia–Vidin | Statement: [Bulgarian State Railways, operatesRoute, Sofia–Vidin]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Sofia–Vidin
Context triple: [Bulgarian State Railways, operatesRoute, Sofia–Vidin]
  • A. Sofia–Burgas
    Sofia–Burgas is a major intercity railway route in Bulgaria connecting the capital Sofia with the Black Sea city of Burgas.
  • B. Sofia–Plovdiv
    Sofia–Plovdiv is a major intercity railway route in Bulgaria connecting the capital Sofia with the country’s second-largest city, Plovdiv.
  • C. Vidin
    Vidin is a historic city and river port in northwestern Bulgaria on the Danube, known for its medieval fortress and role as a regional center during the Second Bulgarian Empire.
  • D. Pleven
    Pleven is a major city in northern Bulgaria known for its historical significance, particularly the Siege of Pleven during the Russo-Turkish War, and its role as an economic and cultural center in the region.
  • E. Tarnovo
    Tarnovo, often called Veliko Tarnovo, is a historic Bulgarian city famed as a medieval capital and cultural stronghold, known for its dramatic hillside setting and well-preserved architectural heritage.
  • 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: Sofia–Vidin
Triple: [Bulgarian State Railways, operatesRoute, Sofia–Vidin]
Generated description
Sofia–Vidin is a Bulgarian railway route connecting the capital city Sofia with the northwestern city of Vidin near the Danube River and the Romanian border.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Sofia–Vidin
Target entity description: Sofia–Vidin is a Bulgarian railway route connecting the capital city Sofia with the northwestern city of Vidin near the Danube River and the Romanian border.
  • A. Sofia–Burgas
    Sofia–Burgas is a major intercity railway route in Bulgaria connecting the capital Sofia with the Black Sea city of Burgas.
  • B. Sofia–Plovdiv
    Sofia–Plovdiv is a major intercity railway route in Bulgaria connecting the capital Sofia with the country’s second-largest city, Plovdiv.
  • C. Vidin
    Vidin is a historic city and river port in northwestern Bulgaria on the Danube, known for its medieval fortress and role as a regional center during the Second Bulgarian Empire.
  • D. Pleven
    Pleven is a major city in northern Bulgaria known for its historical significance, particularly the Siege of Pleven during the Russo-Turkish War, and its role as an economic and cultural center in the region.
  • E. Tarnovo
    Tarnovo, often called Veliko Tarnovo, is a historic Bulgarian city famed as a medieval capital and cultural stronghold, known for its dramatic hillside setting and well-preserved architectural heritage.
  • 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_69e0b4a4f9b081908a5a021919c21ccb completed April 16, 2026, 10:06 a.m.
NER Named-entity recognition batch_69e678734b188190bb2c5863023f9f8c completed April 20, 2026, 7:03 p.m.
NED1 Entity disambiguation (via context triple) batch_6a0997e866c88190b75c0600be7dbcc8 completed May 17, 2026, 10:26 a.m.
NEDg Description generation batch_6a09986fabd08190b2b017aceb9827f6 completed May 17, 2026, 10:29 a.m.
NED2 Entity disambiguation (via description) batch_6a0998e8f2488190800c67f13fb6b1a4 completed May 17, 2026, 10:31 a.m.
Created at: April 16, 2026, 11:26 a.m.