Triple
T14237638
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Hokkaido Shinkansen |
E352926
|
entity |
| Predicate | usesTunnel |
P18707
|
FINISHED |
| Object |
Seikan Tunnel
The Seikan Tunnel is a 53.85-kilometer undersea railway tunnel in Japan that connects the islands of Honshu and Hokkaido beneath the Tsugaru Strait.
|
E1091466
|
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: Seikan Tunnel | Statement: [Hokkaido Shinkansen, usesTunnel, Seikan Tunnel]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Seikan Tunnel Context triple: [Hokkaido Shinkansen, usesTunnel, Seikan Tunnel]
-
A.
Kanmon Tunnel
The Kanmon Tunnel is an undersea railway and road tunnel in Japan that links the islands of Honshu and Kyushu beneath the Kanmon Straits.
-
B.
Tateyama Tunnel
Tateyama Tunnel is a high-altitude mountain tunnel in Japan that forms part of the scenic Tateyama Kurobe Alpine Route through the Northern Japan Alps.
-
C.
Usui Pass tunnel system
The Usui Pass tunnel system is a series of long railway tunnels in Japan that carry high-speed Shinkansen trains through the mountainous Usui Pass region.
-
D.
Ohashi
Ohashi is a neighborhood within Tokyo’s Meguro ward, known as a residential area with convenient urban access.
-
E.
Furka Base Tunnel
The Furka Base Tunnel is a long railway tunnel in the Swiss Alps that provides an all-weather, low-level route beneath the Furka Pass, improving connectivity and reliability on the Matterhorn Gotthard Bahn 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: Seikan Tunnel Triple: [Hokkaido Shinkansen, usesTunnel, Seikan Tunnel]
Generated description
The Seikan Tunnel is a 53.85-kilometer undersea railway tunnel in Japan that connects the islands of Honshu and Hokkaido beneath the Tsugaru Strait.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Seikan Tunnel Target entity description: The Seikan Tunnel is a 53.85-kilometer undersea railway tunnel in Japan that connects the islands of Honshu and Hokkaido beneath the Tsugaru Strait.
-
A.
Kanmon Tunnel
The Kanmon Tunnel is an undersea railway and road tunnel in Japan that links the islands of Honshu and Kyushu beneath the Kanmon Straits.
-
B.
Tateyama Tunnel
Tateyama Tunnel is a high-altitude mountain tunnel in Japan that forms part of the scenic Tateyama Kurobe Alpine Route through the Northern Japan Alps.
-
C.
Usui Pass tunnel system
The Usui Pass tunnel system is a series of long railway tunnels in Japan that carry high-speed Shinkansen trains through the mountainous Usui Pass region.
-
D.
Ohashi
Ohashi is a neighborhood within Tokyo’s Meguro ward, known as a residential area with convenient urban access.
-
E.
Furka Base Tunnel
The Furka Base Tunnel is a long railway tunnel in the Swiss Alps that provides an all-weather, low-level route beneath the Furka Pass, improving connectivity and reliability on the Matterhorn Gotthard Bahn 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_69d8278adc7c8190a9218d69bce3c4e6 |
completed | April 9, 2026, 10:26 p.m. |
| NER | Named-entity recognition | batch_69de62422e28819089e7115052a28c96 |
completed | April 14, 2026, 3:50 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69fd3d0e6abc819097c0c9bdc08387f6 |
completed | May 8, 2026, 1:31 a.m. |
| NEDg | Description generation | batch_69fd3dc46b408190b7c515156f81f1fc |
completed | May 8, 2026, 1:35 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69fd3eb045488190b44812eb638807ff |
completed | May 8, 2026, 1:38 a.m. |
Created at: April 10, 2026, 1:07 a.m.