Triple

T19145463
Position Surface form Disambiguated ID Type / Status
Subject Ngaoundéré railway terminus E468666 entity
Predicate isMainStationOnLine P30882 FINISHED
Object Cameroon central rail line 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: Cameroon central rail line | Statement: [Ngaoundéré railway terminus, isMainStationOnLine, Cameroon central rail line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Cameroon central rail line
Context triple: [Ngaoundéré railway terminus, isMainStationOnLine, Cameroon central rail line]
  • A. Transcameroon Railway chosen
    The Transcameroon Railway is a major rail line in Cameroon that links the country's central and northern regions, supporting both passenger travel and freight transport across key economic areas.
  • B. Trans-Gabon Railway
    The Trans-Gabon Railway is a major rail line in Gabon that connects the inland mining regions to the Atlantic coast, serving as a key route for transporting minerals and goods across the country.
  • C. Bamako–Dakar Railway
    The Bamako–Dakar Railway is a major West African rail line connecting Mali’s capital Bamako with Dakar in Senegal, facilitating regional trade and passenger transport.
  • D. Abidjan–Ouagadougou railway
    The Abidjan–Ouagadougou railway is a major West African rail line linking the port city of Abidjan in Côte d'Ivoire with Ouagadougou, the capital of Burkina Faso, facilitating regional trade and passenger transport.
  • E. Cameroon Line
    The Cameroon Line is a chain of volcanic mountains and islands stretching from the Gulf of Guinea into mainland Central Africa, known for its active and dormant volcanoes such as Mount Cameroon.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: isMainStationOnLine
Context triple: [Ngaoundéré railway terminus, isMainStationOnLine, Cameroon central rail line]
  • A. stationOnLine
    Indicates that a particular station is located on or served by a specific transit line.
  • B. isMajorStationOn chosen
    Indicates that a station serves as a primary or significant stop on a particular route or line.
  • C. isOnLine
    Indicates that one entity is located directly along, or in contact with, a specified line or linear path.
  • D. isBetweenStationsOnLine
    Indicates that something is located or occurs between two stations along the same transit line.
  • E. isRailwayStationInNetwork
    Indicates that a railway station belongs to, and is served as part of, a particular railway network.
  • F. None of above.

Provenance (3 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_69d8dd084ff48190ac0f8c46ee722629 completed April 10, 2026, 11:20 a.m.
NER Named-entity recognition batch_69e5e978b0b481909a531efa030c5def completed April 20, 2026, 8:53 a.m.
PD Predicate disambiguation batch_69e4b9b475d88190a8c15e8eb01dbfef completed April 19, 2026, 11:17 a.m.
Created at: April 10, 2026, 12:06 p.m.