Triple

T2730227
Position Surface form Disambiguated ID Type / Status
Subject District line E60293 entity
Predicate depot P14646 FINISHED
Object Upminster Depot
Upminster Depot is a major London Underground maintenance and stabling facility serving the District line at its eastern end in Upminster.
 E295253 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: Upminster Depot | Statement: [District line, depot, Upminster Depot]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Upminster Depot
Context triple: [District line, depot, Upminster Depot]
  • A. Northumberland Park Depot
    Northumberland Park Depot is a major London Underground maintenance and stabling facility serving trains on the Victoria line.
  • B. Stonebridge Park depot
    Stonebridge Park depot is a London Underground maintenance and stabling facility serving trains on the Bakerloo line.
  • C. Queens Road depot
    Queens Road depot is a major tram maintenance and operations facility serving the Manchester Metrolink light rail network.
  • D. Parker Road Station
    Parker Road Station is a major Dallas Area Rapid Transit (DART) light rail terminus and park-and-ride facility serving the northern suburbs of the Dallas–Fort Worth metroplex.
  • E. Deanwood station
    Deanwood station is an elevated Washington Metro station in Northeast Washington, D.C., serving the Deanwood neighborhood on the system’s Orange Line.
  • 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: Upminster Depot
Triple: [District line, depot, Upminster Depot]
Generated description
Upminster Depot is a major London Underground maintenance and stabling facility serving the District line at its eastern end in Upminster.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Upminster Depot
Target entity description: Upminster Depot is a major London Underground maintenance and stabling facility serving the District line at its eastern end in Upminster.
  • A. Northumberland Park Depot
    Northumberland Park Depot is a major London Underground maintenance and stabling facility serving trains on the Victoria line.
  • B. Stonebridge Park depot
    Stonebridge Park depot is a London Underground maintenance and stabling facility serving trains on the Bakerloo line.
  • C. Queens Road depot
    Queens Road depot is a major tram maintenance and operations facility serving the Manchester Metrolink light rail network.
  • D. Parker Road Station
    Parker Road Station is a major Dallas Area Rapid Transit (DART) light rail terminus and park-and-ride facility serving the northern suburbs of the Dallas–Fort Worth metroplex.
  • E. Deanwood station
    Deanwood station is an elevated Washington Metro station in Northeast Washington, D.C., serving the Deanwood neighborhood on the system’s Orange Line.
  • 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_69ab4b75cd908190b691ef0d1801acda completed March 6, 2026, 9:47 p.m.
NER Named-entity recognition batch_69abdaeca6208190a586afb00747146a completed March 7, 2026, 7:59 a.m.
NED1 Entity disambiguation (via context triple) batch_69afbbc227c48190b7ab34c6760d3331 completed March 10, 2026, 6:35 a.m.
NEDg Description generation batch_69afbd10031c8190b3ebb9d1b5a5bad0 completed March 10, 2026, 6:41 a.m.
NED2 Entity disambiguation (via description) batch_69afbd7be9088190a19bed27249e95c4 completed March 10, 2026, 6:43 a.m.
Created at: March 6, 2026, 9:56 p.m.