Triple
T333004
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Severn |
E6663
|
entity |
| Predicate | hasCrossing |
P416
|
FINISHED |
| Object |
Severn Tunnel
Severn Tunnel is a major railway tunnel in the United Kingdom that runs beneath the River Severn, linking South West England with South Wales.
|
E46960
|
NE FINISHED |
How this triple was built (5 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: Severn Tunnel | Statement: [Severn, hasCrossing, Severn Tunnel]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Severn Tunnel Context triple: [Severn, hasCrossing, Severn Tunnel]
-
A.
Channel Tunnel
The Channel Tunnel is a 50-kilometer undersea rail tunnel linking the United Kingdom and France, serving as a major passenger and freight transport route between the two countries.
-
B.
Long Bridge
Long Bridge is a major railroad bridge over the Potomac River in Washington, D.C., carrying freight and passenger trains between the District of Columbia and Virginia.
-
C.
Thelwall Viaduct
Thelwall Viaduct is a major motorway bridge in north-west England that carries the M6 over the River Mersey and surrounding waterways near Warrington.
-
D.
Barton Swing Aqueduct
Barton Swing Aqueduct is a pioneering movable navigable aqueduct in Greater Manchester, England, that carries the Bridgewater Canal over the Manchester Ship Canal by swinging aside to allow large ships to pass.
-
E.
Manchester Ship Canal
The Manchester Ship Canal is a major 19th-century inland waterway in northwest England that enabled ocean-going ships to reach the industrial city of Manchester from the Irish Sea.
- 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: Severn Tunnel Triple: [Severn, hasCrossing, Severn Tunnel]
Generated description
Severn Tunnel is a major railway tunnel in the United Kingdom that runs beneath the River Severn, linking South West England with South Wales.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Severn Tunnel Target entity description: Severn Tunnel is a major railway tunnel in the United Kingdom that runs beneath the River Severn, linking South West England with South Wales.
-
A.
Channel Tunnel
The Channel Tunnel is a 50-kilometer undersea rail tunnel linking the United Kingdom and France, serving as a major passenger and freight transport route between the two countries.
-
B.
Long Bridge
Long Bridge is a major railroad bridge over the Potomac River in Washington, D.C., carrying freight and passenger trains between the District of Columbia and Virginia.
-
C.
Thelwall Viaduct
Thelwall Viaduct is a major motorway bridge in north-west England that carries the M6 over the River Mersey and surrounding waterways near Warrington.
-
D.
Barton Swing Aqueduct
Barton Swing Aqueduct is a pioneering movable navigable aqueduct in Greater Manchester, England, that carries the Bridgewater Canal over the Manchester Ship Canal by swinging aside to allow large ships to pass.
-
E.
Manchester Ship Canal
The Manchester Ship Canal is a major 19th-century inland waterway in northwest England that enabled ocean-going ships to reach the industrial city of Manchester from the Irish Sea.
- F. None of above. chosen
PD
Predicate disambiguation
gpt-5-mini-2025-08-07
Target predicate: hasCrossing Context triple: [Severn, hasCrossing, Severn Tunnel]
-
A.
crossedBy
chosen
Indicates that one entity (typically a path, line, or boundary) is intersected or traversed by another entity.
-
B.
crossesBetween
Indicates that one entity passes from one side of a second entity to the other, traversing the space between two reference points or boundaries associated with that second entity.
-
C.
hasCrossColor
Indicates that an entity possesses a cross-shaped marking or pattern of a specified color.
-
D.
crossesSectionOf
Indicates that one entity passes through or over a specific segment or portion of another entity.
-
E.
hasAtGradeCrossingNearby
Indicates that one entity (typically a location or segment) has a nearby at-grade crossing where two transportation paths intersect at the same level.
- F. None of above.
Provenance (6 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_69a2e79434908190a9d5afe415153ad9 |
completed | Feb. 28, 2026, 1:03 p.m. |
| NER | Named-entity recognition | batch_69a2eac4d9d081908a624464e450fb0e |
completed | Feb. 28, 2026, 1:16 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69a3eca3d2f08190a0d4008cfb000f4f |
completed | March 1, 2026, 7:37 a.m. |
| NEDg | Description generation | batch_69a3ee6e5d688190bc4e5cee8014ca4d |
completed | March 1, 2026, 7:44 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69a3ef1206148190a0cbc9ebfa943f06 |
completed | March 1, 2026, 7:47 a.m. |
| PD | Predicate disambiguation | batch_69a2e94d99cc8190a112e4b630ec63c1 |
completed | Feb. 28, 2026, 1:10 p.m. |
Created at: Feb. 28, 2026, 1:08 p.m.