Triple
T20301820
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Red Line (MBTA) |
E505499
|
entity |
| Predicate | originalName |
P65
|
FINISHED |
| Object |
Cambridge Tunnel
Cambridge Tunnel is the historic subway tunnel in Cambridge, Massachusetts that originally carried what is now the MBTA Red Line.
|
E1423961
|
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: Cambridge Tunnel | Statement: [Red Line (MBTA), originalName, Cambridge Tunnel]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Cambridge Tunnel Context triple: [Red Line (MBTA), originalName, Cambridge Tunnel]
-
A.
Ellesmere Tunnel
Ellesmere Tunnel is a historic canal tunnel in Shropshire, England, built in the late 18th century as part of the Ellesmere Canal to carry boat traffic beneath rising ground.
-
B.
Caldecott Tunnel
The Caldecott Tunnel is a major highway tunnel in the San Francisco Bay Area that carries traffic through the Berkeley Hills between Oakland and Contra Costa County.
-
C.
Dartford Tunnel
The Dartford Tunnel is a major road tunnel under the River Thames in southeast England, forming part of a key river crossing on the London orbital route.
-
D.
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.
-
E.
Hindhead Tunnel
Hindhead Tunnel is a major road tunnel in Surrey, England, carrying the A3 beneath the Devil’s Punch Bowl to improve traffic flow and reduce environmental impact on the surrounding countryside.
- 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: Cambridge Tunnel Triple: [Red Line (MBTA), originalName, Cambridge Tunnel]
Generated description
Cambridge Tunnel is the historic subway tunnel in Cambridge, Massachusetts that originally carried what is now the MBTA Red Line.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Cambridge Tunnel Target entity description: Cambridge Tunnel is the historic subway tunnel in Cambridge, Massachusetts that originally carried what is now the MBTA Red Line.
-
A.
Ellesmere Tunnel
Ellesmere Tunnel is a historic canal tunnel in Shropshire, England, built in the late 18th century as part of the Ellesmere Canal to carry boat traffic beneath rising ground.
-
B.
Caldecott Tunnel
The Caldecott Tunnel is a major highway tunnel in the San Francisco Bay Area that carries traffic through the Berkeley Hills between Oakland and Contra Costa County.
-
C.
Dartford Tunnel
The Dartford Tunnel is a major road tunnel under the River Thames in southeast England, forming part of a key river crossing on the London orbital route.
-
D.
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.
-
E.
Hindhead Tunnel
Hindhead Tunnel is a major road tunnel in Surrey, England, carrying the A3 beneath the Devil’s Punch Bowl to improve traffic flow and reduce environmental impact on the surrounding countryside.
- 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_69e0b4b8ab648190906e18538c250148 |
completed | April 16, 2026, 10:06 a.m. |
| NER | Named-entity recognition | batch_69e6770d82b48190b21ce7c52ec6d5a0 |
completed | April 20, 2026, 6:57 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_6a08611762e481909ee2f41434c86aa5 |
completed | May 16, 2026, 12:20 p.m. |
| NEDg | Description generation | batch_6a0863506f4481909c106c49f6b71191 |
completed | May 16, 2026, 12:30 p.m. |
| NED2 | Entity disambiguation (via description) | batch_6a0863f4bb788190b6ef1fe57279badb |
completed | May 16, 2026, 12:32 p.m. |
Created at: April 16, 2026, 11:17 a.m.