Triple
T21312058
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Meitetsu Nagoya Main Line |
E525362
|
entity |
| Predicate | hasRollingStockOperator |
P6305
|
FINISHED |
| Object |
Meitetsu 5000 series
The Meitetsu 5000 series is a type of electric multiple unit train operated by the Nagoya Railroad (Meitetsu) in Japan, used primarily for commuter and interurban services.
|
E1481545
|
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: Meitetsu 5000 series | Statement: [Meitetsu Nagoya Main Line, hasRollingStockOperator, Meitetsu 5000 series]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Meitetsu 5000 series Context triple: [Meitetsu Nagoya Main Line, hasRollingStockOperator, Meitetsu 5000 series]
-
A.
Meitetsu 3150 series
The Meitetsu 3150 series is a type of electric multiple unit train operated by Nagoya Railroad (Meitetsu) for commuter services in the Nagoya metropolitan area of Japan.
-
B.
Meitetsu 2200 series
The Meitetsu 2200 series is a Japanese limited express electric multiple unit train type operated by Nagoya Railroad (Meitetsu) for interurban passenger services in the Nagoya area.
-
C.
Meitetsu 3300 series
The Meitetsu 3300 series is a type of electric multiple unit commuter train operated by Nagoya Railroad (Meitetsu) in Japan.
-
D.
Tokyu 5000 series
The Tokyu 5000 series is a Japanese electric multiple unit train type operated by Tokyu Corporation, primarily used for commuter services in the Tokyo metropolitan area.
-
E.
Toei 5500 series
The Toei 5500 series is a modern Japanese electric multiple unit train operated by the Tokyo Metropolitan Bureau of Transportation, designed for through-services and improved comfort and performance on the Toei Asakusa 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: Meitetsu 5000 series Triple: [Meitetsu Nagoya Main Line, hasRollingStockOperator, Meitetsu 5000 series]
Generated description
The Meitetsu 5000 series is a type of electric multiple unit train operated by the Nagoya Railroad (Meitetsu) in Japan, used primarily for commuter and interurban services.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Meitetsu 5000 series Target entity description: The Meitetsu 5000 series is a type of electric multiple unit train operated by the Nagoya Railroad (Meitetsu) in Japan, used primarily for commuter and interurban services.
-
A.
Meitetsu 3150 series
The Meitetsu 3150 series is a type of electric multiple unit train operated by Nagoya Railroad (Meitetsu) for commuter services in the Nagoya metropolitan area of Japan.
-
B.
Meitetsu 2200 series
The Meitetsu 2200 series is a Japanese limited express electric multiple unit train type operated by Nagoya Railroad (Meitetsu) for interurban passenger services in the Nagoya area.
-
C.
Meitetsu 3300 series
The Meitetsu 3300 series is a type of electric multiple unit commuter train operated by Nagoya Railroad (Meitetsu) in Japan.
-
D.
Tokyu 5000 series
The Tokyu 5000 series is a Japanese electric multiple unit train type operated by Tokyu Corporation, primarily used for commuter services in the Tokyo metropolitan area.
-
E.
Toei 5500 series
The Toei 5500 series is a modern Japanese electric multiple unit train operated by the Tokyo Metropolitan Bureau of Transportation, designed for through-services and improved comfort and performance on the Toei Asakusa 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_69e0b518b8948190ad69cf9a8784d397 |
completed | April 16, 2026, 10:08 a.m. |
| NER | Named-entity recognition | batch_69e75dca66ac8190a5f0a372a9bc25a7 |
completed | April 21, 2026, 11:21 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_6a09b4122eb48190bcfccba3e1b2e9c3 |
completed | May 17, 2026, 12:26 p.m. |
| NEDg | Description generation | batch_6a09b4e8562c8190b3f4eff6dc8c09b5 |
completed | May 17, 2026, 12:30 p.m. |
| NED2 | Entity disambiguation (via description) | batch_6a09b79237908190bf90b4316b58c7b1 |
completed | May 17, 2026, 12:41 p.m. |
Created at: April 16, 2026, 4:22 p.m.