Triple

T5458145
Position Surface form Disambiguated ID Type / Status
Subject Sarajevo tram system E122529 entity
Predicate hasRollingStockType P1305 FINISHED
Object Tatra K2 tram
The Tatra K2 tram is a high-capacity articulated tramcar of Czechoslovak design that has been widely used in several Central and Eastern European cities.
 E522291 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: Tatra K2 tram | Statement: [Sarajevo tram system, hasRollingStockType, Tatra K2 tram]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Tatra K2 tram
Context triple: [Sarajevo tram system, hasRollingStockType, Tatra K2 tram]
  • A. Tatra T1 tram
    The Tatra T1 tram is an early postwar Czechoslovak streetcar model that adapted American PCC technology into a robust, standardized design widely used across Eastern Europe.
  • B. Tatra T3 tram
    The Tatra T3 tram is a widely produced and iconic Czechoslovakian streetcar model, renowned for its robust design and extensive use across Eastern Europe and the former Soviet bloc.
  • C. Tatra KT8D5 tram
    The Tatra KT8D5 tram is a high-floor, articulated tramcar model produced in Czechoslovakia in the 1980s, widely used in several Central and Eastern European cities.
  • D. T-68 tram
    The T-68 tram was a type of light rail vehicle used on Greater Manchester’s Metrolink system in the UK before being replaced by newer models.
  • E. SL95 tram
    The SL95 tram is a high-floor, bi-directional tram model used in Oslo, Norway, known for its large capacity and operation on the city’s light rail and tram network.
  • 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: Tatra K2 tram
Triple: [Sarajevo tram system, hasRollingStockType, Tatra K2 tram]
Generated description
The Tatra K2 tram is a high-capacity articulated tramcar of Czechoslovak design that has been widely used in several Central and Eastern European cities.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Tatra K2 tram
Target entity description: The Tatra K2 tram is a high-capacity articulated tramcar of Czechoslovak design that has been widely used in several Central and Eastern European cities.
  • A. Tatra T1 tram
    The Tatra T1 tram is an early postwar Czechoslovak streetcar model that adapted American PCC technology into a robust, standardized design widely used across Eastern Europe.
  • B. Tatra T3 tram
    The Tatra T3 tram is a widely produced and iconic Czechoslovakian streetcar model, renowned for its robust design and extensive use across Eastern Europe and the former Soviet bloc.
  • C. Tatra KT8D5 tram
    The Tatra KT8D5 tram is a high-floor, articulated tramcar model produced in Czechoslovakia in the 1980s, widely used in several Central and Eastern European cities.
  • D. T-68 tram
    The T-68 tram was a type of light rail vehicle used on Greater Manchester’s Metrolink system in the UK before being replaced by newer models.
  • E. SL95 tram
    The SL95 tram is a high-floor, bi-directional tram model used in Oslo, Norway, known for its large capacity and operation on the city’s light rail and tram network.
  • 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_69bd46424248819085282ddf50a565f3 completed March 20, 2026, 1:06 p.m.
NER Named-entity recognition batch_69bd91f1cca48190afa15b8ccfea1f88 completed March 20, 2026, 6:29 p.m.
NED1 Entity disambiguation (via context triple) batch_69bf4885dc708190aff55f4f5d0ff92f completed March 22, 2026, 1:40 a.m.
NEDg Description generation batch_69bf4917bab88190810ff9f32727dabc completed March 22, 2026, 1:42 a.m.
NED2 Entity disambiguation (via description) batch_69bf494e5e788190a4e2ec1b1bb44718 completed March 22, 2026, 1:43 a.m.
Created at: March 20, 2026, 2:08 p.m.