Triple
T19145448
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Ngaoundéré railway terminus |
E468666
|
entity |
| Predicate | railwayLineTerminusOf |
P15150
|
FINISHED |
| Object | Cameroon central rail line |
—
|
NE NERFINISHED |
How this triple was built (2 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, railwayLineTerminusOf, 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, railwayLineTerminusOf, 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.
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_69d8dd084ff48190ac0f8c46ee722629 |
completed | April 10, 2026, 11:20 a.m. |
| NER | Named-entity recognition | batch_69e5e978b0b481909a531efa030c5def |
completed | April 20, 2026, 8:53 a.m. |
Created at: April 10, 2026, 12:06 p.m.