Triple
T7317971
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Mernda line |
E168461
|
entity |
| Predicate | depotUsed |
P591
|
FINISHED |
| Object |
Epping train maintenance facility
The Epping train maintenance facility is a major rail depot in Melbourne that services and maintains suburban trains operating on the city's northern lines.
|
E656866
|
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: Epping train maintenance facility | Statement: [Mernda line, depotUsed, Epping train maintenance facility]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Epping train maintenance facility Context triple: [Mernda line, depotUsed, Epping train maintenance facility]
-
A.
Hainault depot
Hainault depot is a major London Underground maintenance and stabling facility serving trains on the Central line in northeast London.
-
B.
Ealing Common Depot
Ealing Common Depot is a London Underground maintenance and stabling facility serving primarily the District line in west London.
-
C.
Neasden Depot
Neasden Depot is a major London Underground maintenance and stabling facility serving trains on the Metropolitan line.
-
D.
Basildon railway station
Basildon railway station is the main rail hub serving the town of Basildon in Essex, England, on the London, Tilbury and Southend line.
-
E.
Cricklewood depot
Cricklewood depot is a railway maintenance and stabling facility in the Cricklewood area of north-west London, serving trains on the Midland Main Line and surrounding routes.
- 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: Epping train maintenance facility Triple: [Mernda line, depotUsed, Epping train maintenance facility]
Generated description
The Epping train maintenance facility is a major rail depot in Melbourne that services and maintains suburban trains operating on the city's northern lines.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Epping train maintenance facility Target entity description: The Epping train maintenance facility is a major rail depot in Melbourne that services and maintains suburban trains operating on the city's northern lines.
-
A.
Hainault depot
Hainault depot is a major London Underground maintenance and stabling facility serving trains on the Central line in northeast London.
-
B.
Ealing Common Depot
Ealing Common Depot is a London Underground maintenance and stabling facility serving primarily the District line in west London.
-
C.
Neasden Depot
Neasden Depot is a major London Underground maintenance and stabling facility serving trains on the Metropolitan line.
-
D.
Basildon railway station
Basildon railway station is the main rail hub serving the town of Basildon in Essex, England, on the London, Tilbury and Southend line.
-
E.
Cricklewood depot
Cricklewood depot is a railway maintenance and stabling facility in the Cricklewood area of north-west London, serving trains on the Midland Main Line and surrounding routes.
- 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_69c68a5251508190ad68df4151cfeb04 |
completed | March 27, 2026, 1:46 p.m. |
| NER | Named-entity recognition | batch_69c6ef178b3081908cd0c62466069741 |
completed | March 27, 2026, 8:56 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69c7eef847948190a0f2066008f63efd |
completed | March 28, 2026, 3:08 p.m. |
| NEDg | Description generation | batch_69c7ef6cf4208190b6242aaea1e20b8e |
completed | March 28, 2026, 3:10 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69c7f01543e8819082bf2dfd49d8fb28 |
completed | March 28, 2026, 3:13 p.m. |
Created at: March 27, 2026, 3:02 p.m.