Triple

T19790386
Position Surface form Disambiguated ID Type / Status
Subject Dar es Salaam Region E475392 entity
Predicate hasRailConnection P848 FINISHED
Object Tanzania Central Railway NE NERFINISHED

How this triple was built (3 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: Tanzania Central Railway | Statement: [Dar es Salaam Region, hasRailConnection, Tanzania Central Railway]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Tanzania Central Railway
Context triple: [Dar es Salaam Region, hasRailConnection, Tanzania Central Railway]
  • A. Tanzania–Zambia Railway (TAZARA)
    The Tanzania–Zambia Railway (TAZARA) is a major bi-national rail line built with Chinese assistance that links landlocked Zambia to the Tanzanian port of Dar es Salaam, serving as a key transport and trade corridor in East and Southern Africa.
  • B. Tabora–Mpanda railway
    The Tabora–Mpanda railway is a regional rail line in western Tanzania that connects the town of Tabora with Mpanda, supporting transport and economic activity across the area.
  • C. Tabora–Kigoma railway
    The Tabora–Kigoma railway is a key western Tanzanian rail line connecting the inland rail hub of Tabora to the port town of Kigoma on Lake Tanganyika, facilitating regional trade and passenger transport.
  • D. Tanzanian railway network
    The Tanzanian railway network is the national system of rail lines that connects major cities, ports, and inland regions across Tanzania for passenger and freight transport.
  • E. Mombasa–Nairobi railway
    The Mombasa–Nairobi railway is a major rail line in Kenya linking the coastal city of Mombasa with the capital Nairobi, historically significant for its role in colonial-era transport and regional development.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Tanzania Central Railway
Target entity description: Tanzania Central Railway is a major rail line in Tanzania that connects the coastal city of Dar es Salaam with key inland regions, serving as an important corridor for passenger and freight transport.
  • A. Tanzania–Zambia Railway (TAZARA)
    The Tanzania–Zambia Railway (TAZARA) is a major bi-national rail line built with Chinese assistance that links landlocked Zambia to the Tanzanian port of Dar es Salaam, serving as a key transport and trade corridor in East and Southern Africa.
  • B. Tabora–Mpanda railway
    The Tabora–Mpanda railway is a regional rail line in western Tanzania that connects the town of Tabora with Mpanda, supporting transport and economic activity across the area.
  • C. Tabora–Kigoma railway chosen
    The Tabora–Kigoma railway is a key western Tanzanian rail line connecting the inland rail hub of Tabora to the port town of Kigoma on Lake Tanganyika, facilitating regional trade and passenger transport.
  • D. Tanzanian railway network
    The Tanzanian railway network is the national system of rail lines that connects major cities, ports, and inland regions across Tanzania for passenger and freight transport.
  • E. Mombasa–Nairobi railway
    The Mombasa–Nairobi railway is a major rail line in Kenya linking the coastal city of Mombasa with the capital Nairobi, historically significant for its role in colonial-era transport and regional development.
  • F. None of above.

Provenance (2 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_69d8e51b014081908b263e167370529a completed April 10, 2026, 11:55 a.m.
NER Named-entity recognition batch_69e653c217bc819092c517b27ca22087 completed April 20, 2026, 4:26 p.m.
Created at: April 10, 2026, 1:49 p.m.