Triple
T11593957
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Merseyrail |
E274951
|
entity |
| Predicate | usesRollingStock |
P5426
|
FINISHED |
| Object |
Class 508 electric multiple units
The Class 508 electric multiple units are British third-rail commuter trains built in the late 1970s, widely used for suburban passenger services on networks such as Merseyrail.
|
E938012
|
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: Class 508 electric multiple units | Statement: [Merseyrail, usesRollingStock, Class 508 electric multiple units]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Class 508 electric multiple units Context triple: [Merseyrail, usesRollingStock, Class 508 electric multiple units]
-
A.
Class 507 electric multiple units
The Class 507 electric multiple units are a fleet of third-rail suburban electric trains built in the late 1970s for commuter services around Liverpool, now primarily operating on the Merseyrail network.
-
B.
Class 350 electric multiple units
The Class 350 electric multiple units are a family of British dual-voltage commuter trains built by Siemens for regional and intercity services on the UK rail network.
-
C.
Class 385 electric multiple units
The Class 385 electric multiple units are modern electric commuter trains used by ScotRail, primarily operating on electrified routes in Scotland’s Central Belt.
-
D.
Class 150 diesel multiple unit
The Class 150 diesel multiple unit is a British two- or three-car regional passenger train introduced in the 1980s and widely used on local and suburban services across the UK rail network.
-
E.
Class 158 diesel multiple unit
The Class 158 diesel multiple unit is a British regional passenger train built in the late 1980s and early 1990s, known for its air-conditioned interiors and use on longer-distance services across the UK rail network.
- 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: Class 508 electric multiple units Triple: [Merseyrail, usesRollingStock, Class 508 electric multiple units]
Generated description
The Class 508 electric multiple units are British third-rail commuter trains built in the late 1970s, widely used for suburban passenger services on networks such as Merseyrail.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Class 508 electric multiple units Target entity description: The Class 508 electric multiple units are British third-rail commuter trains built in the late 1970s, widely used for suburban passenger services on networks such as Merseyrail.
-
A.
Class 507 electric multiple units
The Class 507 electric multiple units are a fleet of third-rail suburban electric trains built in the late 1970s for commuter services around Liverpool, now primarily operating on the Merseyrail network.
-
B.
Class 350 electric multiple units
The Class 350 electric multiple units are a family of British dual-voltage commuter trains built by Siemens for regional and intercity services on the UK rail network.
-
C.
Class 385 electric multiple units
The Class 385 electric multiple units are modern electric commuter trains used by ScotRail, primarily operating on electrified routes in Scotland’s Central Belt.
-
D.
Class 150 diesel multiple unit
The Class 150 diesel multiple unit is a British two- or three-car regional passenger train introduced in the 1980s and widely used on local and suburban services across the UK rail network.
-
E.
Class 158 diesel multiple unit
The Class 158 diesel multiple unit is a British regional passenger train built in the late 1980s and early 1990s, known for its air-conditioned interiors and use on longer-distance services across the UK rail network.
- 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_69d6aae6b14c81908dc5a74bad7591f9 |
completed | April 8, 2026, 7:22 p.m. |
| NER | Named-entity recognition | batch_69d8946594348190935106132fd18028 |
completed | April 10, 2026, 6:10 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69ee86f246848190a5b020c3e05d02dd |
completed | April 26, 2026, 9:43 p.m. |
| NEDg | Description generation | batch_69eeb310e04c8190a1004662d5bbc015 |
completed | April 27, 2026, 12:51 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69eee95dfff48190a3c3022cdfc6dafc |
completed | April 27, 2026, 4:43 a.m. |
Created at: April 8, 2026, 9:38 p.m.