Triple

T2952761
Position Surface form Disambiguated ID Type / Status
Subject PCC streetcar E79857 entity
Predicate influenced P9 FINISHED
Object 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.
 E315084 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 T1 tram | Statement: [PCC streetcar, influenced, Tatra T1 tram]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Tatra T1 tram
Context triple: [PCC streetcar, influenced, Tatra T1 tram]
  • A. 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.
  • B. LM-93 tram
    The LM-93 tram is a Russian-built light rail vehicle model commonly used in city tram and metrotram systems such as the Volgograd Metrotram.
  • C. 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.
  • D. SL79 tram
    The SL79 tram is a class of articulated light rail vehicles used for passenger service on the Oslo Tramway network in Norway.
  • E. Stadler Tango trams
    Stadler Tango trams are modern, low-floor light rail vehicles built by Stadler Rail, commonly used in European cities for high-capacity, urban public transport services.
  • 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 T1 tram
Triple: [PCC streetcar, influenced, Tatra T1 tram]
Generated description
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.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Tatra T1 tram
Target entity description: 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.
  • A. 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.
  • B. LM-93 tram
    The LM-93 tram is a Russian-built light rail vehicle model commonly used in city tram and metrotram systems such as the Volgograd Metrotram.
  • C. 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.
  • D. SL79 tram
    The SL79 tram is a class of articulated light rail vehicles used for passenger service on the Oslo Tramway network in Norway.
  • E. Stadler Tango trams
    Stadler Tango trams are modern, low-floor light rail vehicles built by Stadler Rail, commonly used in European cities for high-capacity, urban public transport services.
  • 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_69ad8b1276588190a374a0b12e0f7bdf completed March 8, 2026, 2:43 p.m.
NER Named-entity recognition batch_69ad98fe4b688190a0f68c4f80cd6f8f completed March 8, 2026, 3:42 p.m.
NED1 Entity disambiguation (via context triple) batch_69b0fc82d1248190869beffffc0bf956 completed March 11, 2026, 5:24 a.m.
NEDg Description generation batch_69b0fd25e07c819088b2b1bcef4cf54e completed March 11, 2026, 5:27 a.m.
NED2 Entity disambiguation (via description) batch_69b100ecbee081908832ddec0efdc751 completed March 11, 2026, 5:43 a.m.
Created at: March 8, 2026, 2:57 p.m.