Triple
T7082409
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | London Underground Central line |
E164986
|
entity |
| Predicate | formerExtension |
P60482
|
FINISHED |
| Object |
Epping to Ongar branch
The Epping to Ongar branch was a rural stretch of railway in Essex that once formed the outermost section of the London Underground’s Central line before its closure in the 1990s.
|
E640226
|
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 to Ongar branch | Statement: [London Underground Central line, formerExtension, Epping to Ongar branch]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Epping to Ongar branch Context triple: [London Underground Central line, formerExtension, Epping to Ongar branch]
-
A.
Chingford branch line
The Chingford branch line is a suburban railway route in northeast London that connects central London with the Chingford area, serving several intermediate stations along the way.
-
B.
Romford–Upminster line
The Romford–Upminster line is a short suburban railway in east London linking Romford and Upminster, operated as part of the London Overground network.
-
C.
Hertford East branch line
The Hertford East branch line is a suburban railway line in Hertfordshire, England, providing passenger services between Hertford East and the main rail network via the Lea Valley corridor.
-
D.
Gospel Oak to Barking line
The Gospel Oak to Barking line is a London Overground suburban railway route in north and east London, known for linking Gospel Oak with Barking and serving as an important orbital connection outside central London.
-
E.
Shenfield–Southend Line
The Shenfield–Southend Line is a suburban railway route in Essex, England, connecting Shenfield with Southend and serving intermediate communities including Southend Airport.
- 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 to Ongar branch Triple: [London Underground Central line, formerExtension, Epping to Ongar branch]
Generated description
The Epping to Ongar branch was a rural stretch of railway in Essex that once formed the outermost section of the London Underground’s Central line before its closure in the 1990s.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Epping to Ongar branch Target entity description: The Epping to Ongar branch was a rural stretch of railway in Essex that once formed the outermost section of the London Underground’s Central line before its closure in the 1990s.
-
A.
Chingford branch line
The Chingford branch line is a suburban railway route in northeast London that connects central London with the Chingford area, serving several intermediate stations along the way.
-
B.
Romford–Upminster line
The Romford–Upminster line is a short suburban railway in east London linking Romford and Upminster, operated as part of the London Overground network.
-
C.
Hertford East branch line
The Hertford East branch line is a suburban railway line in Hertfordshire, England, providing passenger services between Hertford East and the main rail network via the Lea Valley corridor.
-
D.
Gospel Oak to Barking line
The Gospel Oak to Barking line is a London Overground suburban railway route in north and east London, known for linking Gospel Oak with Barking and serving as an important orbital connection outside central London.
-
E.
Shenfield–Southend Line
The Shenfield–Southend Line is a suburban railway route in Essex, England, connecting Shenfield with Southend and serving intermediate communities including Southend Airport.
- 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_69c6887d98408190912b9580666b0c1d |
completed | March 27, 2026, 1:39 p.m. |
| NER | Named-entity recognition | batch_69c6e50f133c81908c5f7336fd5bc5d2 |
completed | March 27, 2026, 8:14 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69c7947c32f081909340b05a46ae7bdd |
completed | March 28, 2026, 8:42 a.m. |
| NEDg | Description generation | batch_69c79523b1e881909b7f31a20f03d4b3 |
completed | March 28, 2026, 8:45 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69c795e542d881909defeb4056898495 |
completed | March 28, 2026, 8:48 a.m. |
Created at: March 27, 2026, 2:40 p.m.