Triple
T7430693
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | London Underground Metropolitan line |
E171480
|
entity |
| Predicate | rollingStock |
P1305
|
FINISHED |
| Object |
London Underground S8 Stock
The London Underground S8 Stock is a modern fleet of air-conditioned, walk-through electric multiple units used on the Metropolitan line, designed to increase capacity and improve passenger comfort and accessibility.
|
E662936
|
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: London Underground S8 Stock | Statement: [London Underground Metropolitan line, rollingStock, London Underground S8 Stock]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: London Underground S8 Stock Context triple: [London Underground Metropolitan line, rollingStock, London Underground S8 Stock]
-
A.
M1 Millennium Underground Railway
The M1 Millennium Underground Railway is Budapest’s historic yellow metro line, recognized as the oldest electrified underground railway on the European continent and a UNESCO World Heritage site.
-
B.
Tyne and Wear Metro Class 994 units
The Tyne and Wear Metro Class 994 units are electric multiple-unit trains specifically built for and operated on the Tyne and Wear Metro light rail system in North East England.
-
C.
London Overground
London Overground is a suburban rail network in London that connects outer districts and some central hubs using a mix of newly built and former National Rail lines, integrated into the city’s public transport system.
-
D.
London Underground
The London Underground is a rapid transit system serving Greater London and surrounding areas, famous as one of the world's oldest and most extensive metro networks.
-
E.
Siemens U2 LRVs
Siemens U2 LRVs are a series of high-floor light rail vehicles built by Siemens for urban transit systems, widely used in early North American and European light rail networks.
- 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: London Underground S8 Stock Triple: [London Underground Metropolitan line, rollingStock, London Underground S8 Stock]
Generated description
The London Underground S8 Stock is a modern fleet of air-conditioned, walk-through electric multiple units used on the Metropolitan line, designed to increase capacity and improve passenger comfort and accessibility.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: London Underground S8 Stock Target entity description: The London Underground S8 Stock is a modern fleet of air-conditioned, walk-through electric multiple units used on the Metropolitan line, designed to increase capacity and improve passenger comfort and accessibility.
-
A.
M1 Millennium Underground Railway
The M1 Millennium Underground Railway is Budapest’s historic yellow metro line, recognized as the oldest electrified underground railway on the European continent and a UNESCO World Heritage site.
-
B.
Tyne and Wear Metro Class 994 units
The Tyne and Wear Metro Class 994 units are electric multiple-unit trains specifically built for and operated on the Tyne and Wear Metro light rail system in North East England.
-
C.
London Overground
London Overground is a suburban rail network in London that connects outer districts and some central hubs using a mix of newly built and former National Rail lines, integrated into the city’s public transport system.
-
D.
London Underground
The London Underground is a rapid transit system serving Greater London and surrounding areas, famous as one of the world's oldest and most extensive metro networks.
-
E.
Siemens U2 LRVs
Siemens U2 LRVs are a series of high-floor light rail vehicles built by Siemens for urban transit systems, widely used in early North American and European light rail networks.
- 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_69c68a63491881909281f73d4d5643bf |
completed | March 27, 2026, 1:47 p.m. |
| NER | Named-entity recognition | batch_69c6f32324c481908c9ba594e8456728 |
completed | March 27, 2026, 9:14 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69c81f135a348190ae9edc02a19b2278 |
completed | March 28, 2026, 6:33 p.m. |
| NEDg | Description generation | batch_69c81fffd8c0819080baa0bce5351111 |
completed | March 28, 2026, 6:37 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69c820a90ae08190b7872bc44085f4a3 |
completed | March 28, 2026, 6:40 p.m. |
Created at: March 27, 2026, 3:12 p.m.