Triple
T19208213
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Merthyr Tydfil |
E480290
|
entity |
| Predicate | hasLandmark |
P105
|
FINISHED |
| Object | Pontsarn Viaduct |
—
|
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: Pontsarn Viaduct | Statement: [Merthyr Tydfil, hasLandmark, Pontsarn Viaduct]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Pontsarn Viaduct Context triple: [Merthyr Tydfil, hasLandmark, Pontsarn Viaduct]
-
A.
Landore Viaduct
Landore Viaduct is a historic railway bridge in Swansea, Wales, carrying rail traffic across the River Tawe.
-
B.
Lechmere Viaduct
Lechmere Viaduct is a historic concrete arch bridge in Boston that carries MBTA Green Line trains across the Charles River between Boston and Cambridge.
-
C.
Goyt Viaduct
Goyt Viaduct is a historic railway viaduct in Derbyshire, England, carrying tracks high over the River Goyt as part of the former Midland Railway route.
-
D.
Hengoed Viaduct
Hengoed Viaduct is a historic multi-arched railway viaduct in Hengoed, Wales, notable for its impressive stone construction and role in the region’s industrial-era rail network.
-
E.
Bellegarde railway viaduct
The Bellegarde railway viaduct is a prominent multi-arch rail bridge in Bellegarde-sur-Valserine, France, carrying train lines across the local river valley and serving as a key piece of regional transport infrastructure.
- 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: Pontsarn Viaduct Target entity description: Pontsarn Viaduct is a historic multi-arched railway viaduct in South Wales, notable for spanning the Taff Gorge and serving as a prominent industrial-era structure in the Merthyr Tydfil area.
-
A.
Landore Viaduct
Landore Viaduct is a historic railway bridge in Swansea, Wales, carrying rail traffic across the River Tawe.
-
B.
Lechmere Viaduct
Lechmere Viaduct is a historic concrete arch bridge in Boston that carries MBTA Green Line trains across the Charles River between Boston and Cambridge.
-
C.
Goyt Viaduct
Goyt Viaduct is a historic railway viaduct in Derbyshire, England, carrying tracks high over the River Goyt as part of the former Midland Railway route.
-
D.
Hengoed Viaduct
chosen
Hengoed Viaduct is a historic multi-arched railway viaduct in Hengoed, Wales, notable for its impressive stone construction and role in the region’s industrial-era rail network.
-
E.
Bellegarde railway viaduct
The Bellegarde railway viaduct is a prominent multi-arch rail bridge in Bellegarde-sur-Valserine, France, carrying train lines across the local river valley and serving as a key piece of regional transport infrastructure.
- 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_69d8e8cb8c348190b52075823911c869 |
completed | April 10, 2026, 12:10 p.m. |
| NER | Named-entity recognition | batch_69e5f99e9f8c8190b73db55f3f8bbf20 |
completed | April 20, 2026, 10:02 a.m. |
Created at: April 10, 2026, 1:20 p.m.