Triple

T11593969
Position Surface form Disambiguated ID Type / Status
Subject Merseyrail E274951 entity
Predicate hasDepot P2413 FINISHED
Object Birkenhead North TMD
Birkenhead North TMD is a railway traction maintenance depot on the Merseyrail network that services and maintains the system’s electric multiple units.
 E347833 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: Birkenhead North TMD | Statement: [Merseyrail, hasDepot, Birkenhead North TMD]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Birkenhead North TMD
Context triple: [Merseyrail, hasDepot, Birkenhead North TMD]
  • A. Birkenhead North railway station
    Birkenhead North railway station is a Merseyrail commuter rail station serving the town of Wallasey on the Wirral Peninsula in England.
  • B. Birkenhead Central railway station
    Birkenhead Central railway station is a key Merseyrail station on the Wirral Line serving the town of Birkenhead in Merseyside, England.
  • C. Trafford depot
    Trafford depot is a maintenance and stabling facility serving the Manchester Metrolink light rail network in Greater Manchester, England.
  • D. Northfields depot
    Northfields depot is a London Underground maintenance and stabling facility serving trains on the Piccadilly line in west London.
  • E. Keele station
    Keele station is a subway station in Toronto, Ontario, serving the Bloor–Danforth line of the Toronto Transit Commission (TTC).
  • 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: Birkenhead North TMD
Triple: [Merseyrail, hasDepot, Birkenhead North TMD]
Generated description
Birkenhead North TMD is a railway traction maintenance depot on the Merseyrail network that services and maintains the system’s electric multiple units.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Birkenhead North TMD
Target entity description: Birkenhead North TMD is a railway traction maintenance depot on the Merseyrail network that services and maintains the system’s electric multiple units.
  • A. Birkenhead North railway station chosen
    Birkenhead North railway station is a Merseyrail commuter rail station serving the town of Wallasey on the Wirral Peninsula in England.
  • B. Birkenhead Central railway station
    Birkenhead Central railway station is a key Merseyrail station on the Wirral Line serving the town of Birkenhead in Merseyside, England.
  • C. Trafford depot
    Trafford depot is a maintenance and stabling facility serving the Manchester Metrolink light rail network in Greater Manchester, England.
  • D. Northfields depot
    Northfields depot is a London Underground maintenance and stabling facility serving trains on the Piccadilly line in west London.
  • E. Keele station
    Keele station is a subway station in Toronto, Ontario, serving the Bloor–Danforth line of the Toronto Transit Commission (TTC).
  • F. None of above.

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_69e7146fdd8c8190a54f3290e155e900 completed April 21, 2026, 6:08 a.m.
NEDg Description generation batch_69e720fc0f38819083bd15169f2ce4bb completed April 21, 2026, 7:02 a.m.
NED2 Entity disambiguation (via description) batch_69e72353c19c8190b7a579e9af823872 completed April 21, 2026, 7:12 a.m.
Created at: April 8, 2026, 9:38 p.m.