Triple
T6215382
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Shibuya Depot |
E138972
|
entity |
| Predicate | ownedBy |
P347
|
FINISHED |
| Object |
Tokyo Metro Co., Ltd.
Tokyo Metro Co., Ltd. is the major private railway operator that runs most of the subway network in central Tokyo, Japan.
|
E156852
|
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: Tokyo Metro Co., Ltd. | Statement: [Shibuya Depot, ownedBy, Tokyo Metro Co., Ltd.]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Tokyo Metro Co., Ltd. Context triple: [Shibuya Depot, ownedBy, Tokyo Metro Co., Ltd.]
-
A.
Tokyo Metropolitan Bureau of Transportation
The Tokyo Metropolitan Bureau of Transportation is the local government agency that operates key public transit services in Tokyo, including subways, trams, and buses.
-
B.
Tokyu Railways
Tokyu Railways is a major private railway operator in the Greater Tokyo area of Japan, known for its extensive commuter rail network and integration with urban development projects.
-
C.
Keihan Electric Railway Co., Ltd.
Keihan Electric Railway Co., Ltd. is a major Japanese private railway operator serving the Osaka–Kyoto region, known for its extensive commuter rail network and related transportation and leisure businesses.
-
D.
Teito Rapid Transit Authority
Teito Rapid Transit Authority was the former public operator of several Tokyo subway lines before its privatization and reorganization as Tokyo Metro.
-
E.
PASMO Co., Ltd.
PASMO Co., Ltd. is the company that manages and operates the PASMO rechargeable contactless smart card system used for public transportation and electronic payments in the Tokyo metropolitan area.
- 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: Tokyo Metro Co., Ltd. Triple: [Shibuya Depot, ownedBy, Tokyo Metro Co., Ltd.]
Generated description
Tokyo Metro Co., Ltd. is the major private railway operator that runs most of the subway network in central Tokyo, Japan.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Tokyo Metro Co., Ltd. Target entity description: Tokyo Metro Co., Ltd. is the major private railway operator that runs most of the subway network in central Tokyo, Japan.
-
A.
Tokyo Metropolitan Bureau of Transportation
The Tokyo Metropolitan Bureau of Transportation is the local government agency that operates key public transit services in Tokyo, including subways, trams, and buses.
-
B.
Tokyu Railways
Tokyu Railways is a major private railway operator in the Greater Tokyo area of Japan, known for its extensive commuter rail network and integration with urban development projects.
-
C.
Keihan Electric Railway Co., Ltd.
Keihan Electric Railway Co., Ltd. is a major Japanese private railway operator serving the Osaka–Kyoto region, known for its extensive commuter rail network and related transportation and leisure businesses.
-
D.
Teito Rapid Transit Authority
chosen
Teito Rapid Transit Authority was the former public operator of several Tokyo subway lines before its privatization and reorganization as Tokyo Metro.
-
E.
PASMO Co., Ltd.
PASMO Co., Ltd. is the company that manages and operates the PASMO rechargeable contactless smart card system used for public transportation and electronic payments in the Tokyo metropolitan area.
- F. None of above.
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_69c008ada364819096c9e92c74d639b5 |
completed | March 22, 2026, 3:20 p.m. |
| NER | Named-entity recognition | batch_69c062a0e0488190b71b42386bacf982 |
completed | March 22, 2026, 9:44 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69c77510f80c81908fe7784bdaa640c5 |
completed | March 28, 2026, 6:28 a.m. |
| NEDg | Description generation | batch_69c777671e248190b0b9a38f798446d9 |
completed | March 28, 2026, 6:38 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69c777c80d6c8190b4e7cd0243c9042e |
completed | March 28, 2026, 6:40 a.m. |
Created at: March 22, 2026, 4:21 p.m.