Triple
T9602731
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Tokyo metropolitan area |
E231887
|
entity |
| Predicate | hasMajorRailwayOperator |
P5620
|
FINISHED |
| Object | Toei Subway |
E35464
|
NE FINISHED |
How this triple was built (2 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: Toei Subway | Statement: [Tokyo metropolitan area, hasMajorRailwayOperator, Toei Subway]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Toei Subway Context triple: [Tokyo metropolitan area, hasMajorRailwayOperator, Toei Subway]
-
A.
Toei Subway
chosen
Toei Subway is one of Tokyo's two main subway networks, operated by the Tokyo Metropolitan Bureau of Transportation and serving numerous urban and suburban areas across the city.
-
B.
Tokyo Metro
Tokyo Metro is one of the two main rapid transit operators in Tokyo, running an extensive network of subway lines that serve the city’s central and metropolitan areas.
-
C.
Sendai Subway
Sendai Subway is an urban rapid transit system serving the city of Sendai in Japan, providing key north–south and east–west rail connections across the metropolitan area.
-
D.
Tokyo Metro Fukutoshin Line
The Tokyo Metro Fukutoshin Line is a major Tokyo subway line running north–south through central and suburban areas, connecting key hubs such as Shibuya with other important districts.
-
E.
Tokyu Den-en-toshi Line
Tokyu Den-en-toshi Line is a major private railway line in the Tokyo metropolitan area that connects central Tokyo with suburban residential districts, including service to Shibuya.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Provenance (3 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_69ca8484838c8190b2049199d22fef70 |
completed | March 30, 2026, 2:11 p.m. |
| NER | Named-entity recognition | batch_69cd9a5af8f0819089408ed630afa812 |
completed | April 1, 2026, 10:21 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69d1792ba9388190b98d4fb081510c30 |
completed | April 4, 2026, 8:48 p.m. |
Created at: March 30, 2026, 8:08 p.m.