Triple
T9942852
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Tokyo Metropolitan Bureau of Transportation |
E194125
|
entity |
| Predicate | operates |
P24
|
FINISHED |
| Object |
Toei Streetcar (Toden Arakawa Line)
The Toei Streetcar (Toden Arakawa Line) is one of Tokyo’s last remaining traditional tram lines, running through older residential neighborhoods and offering a nostalgic, slower-paced alternative to the city’s modern rail network.
|
E832693
|
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: Toei Streetcar (Toden Arakawa Line) | Statement: [Tokyo Metropolitan Bureau of Transportation, operates, Toei Streetcar (Toden Arakawa Line)]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Toei Streetcar (Toden Arakawa Line) Context triple: [Tokyo Metropolitan Bureau of Transportation, operates, Toei Streetcar (Toden Arakawa Line)]
-
A.
Toei Asakusa Line
The Toei Asakusa Line is a major Tokyo subway line operated by the Tokyo Metropolitan Bureau of Transportation, connecting central Tokyo with surrounding areas and offering through-services to several private railway lines.
-
B.
Tokyu Setagaya Line
The Tokyu Setagaya Line is a light rail/tram line in Tokyo, Japan, operated by Tokyu Corporation and known for connecting Sangen-Jaya with the Setagaya area along a short, mostly street-level route.
-
C.
Toei Oedo Line
The Toei Oedo Line is a major Tokyo subway loop and radial line operated by the Tokyo Metropolitan Bureau of Transportation, connecting central districts with many key commercial and residential areas.
-
D.
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.
-
E.
Seibu Toshima Line
The Seibu Toshima Line is a short commuter railway line in Tokyo, Japan, operated by Seibu Railway and connecting Nerima and Toshimaen in the city’s northwest.
- 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: Toei Streetcar (Toden Arakawa Line) Triple: [Tokyo Metropolitan Bureau of Transportation, operates, Toei Streetcar (Toden Arakawa Line)]
Generated description
The Toei Streetcar (Toden Arakawa Line) is one of Tokyo’s last remaining traditional tram lines, running through older residential neighborhoods and offering a nostalgic, slower-paced alternative to the city’s modern rail network.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Toei Streetcar (Toden Arakawa Line) Target entity description: The Toei Streetcar (Toden Arakawa Line) is one of Tokyo’s last remaining traditional tram lines, running through older residential neighborhoods and offering a nostalgic, slower-paced alternative to the city’s modern rail network.
-
A.
Toei Asakusa Line
The Toei Asakusa Line is a major Tokyo subway line operated by the Tokyo Metropolitan Bureau of Transportation, connecting central Tokyo with surrounding areas and offering through-services to several private railway lines.
-
B.
Tokyu Setagaya Line
The Tokyu Setagaya Line is a light rail/tram line in Tokyo, Japan, operated by Tokyu Corporation and known for connecting Sangen-Jaya with the Setagaya area along a short, mostly street-level route.
-
C.
Toei Oedo Line
The Toei Oedo Line is a major Tokyo subway loop and radial line operated by the Tokyo Metropolitan Bureau of Transportation, connecting central districts with many key commercial and residential areas.
-
D.
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.
-
E.
Seibu Toshima Line
The Seibu Toshima Line is a short commuter railway line in Tokyo, Japan, operated by Seibu Railway and connecting Nerima and Toshimaen in the city’s northwest.
- 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_69ca82e409348190a393777356b80a2a |
completed | March 30, 2026, 2:04 p.m. |
| NER | Named-entity recognition | batch_69cdb6124a188190b41feadb7b2f8922 |
completed | April 2, 2026, 12:19 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69d23d5095e08190a34ff73ab7bcf8a6 |
completed | April 5, 2026, 10:45 a.m. |
| NEDg | Description generation | batch_69d24135c0b88190ad018858b99e0bde |
completed | April 5, 2026, 11:02 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69d241ca07b481908a2852ed15ed5cf2 |
completed | April 5, 2026, 11:04 a.m. |
Created at: March 30, 2026, 8:45 p.m.