Triple
T12438673
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Johannes Mehserle |
E297212
|
entity |
| Predicate | employer |
P7
|
FINISHED |
| Object |
Bay Area Rapid Transit Police Department
The Bay Area Rapid Transit Police Department is the law enforcement agency responsible for policing the Bay Area Rapid Transit (BART) system in the San Francisco Bay Area.
|
E983971
|
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: Bay Area Rapid Transit Police Department | Statement: [Johannes Mehserle, employer, Bay Area Rapid Transit Police Department]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Bay Area Rapid Transit Police Department Context triple: [Johannes Mehserle, employer, Bay Area Rapid Transit Police Department]
-
A.
San Francisco Police Department
The San Francisco Police Department is the municipal law enforcement agency responsible for public safety, crime prevention, and policing within the city and county of San Francisco, California.
-
B.
San Francisco Sheriff’s Office
The San Francisco Sheriff’s Office is the county law enforcement agency responsible for operating jails, providing court security, and performing civil and custody-related duties within the City and County of San Francisco.
-
C.
San Jose Police Department
The San Jose Police Department is the municipal law enforcement agency responsible for policing and public safety in the city of San Jose, California.
-
D.
East Palo Alto Police Department
The East Palo Alto Police Department is the municipal law enforcement agency responsible for public safety and crime prevention within the city of East Palo Alto, California.
-
E.
Oakland Police Department
The Oakland Police Department is the municipal law enforcement agency responsible for policing the city of Oakland, California.
- 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: Bay Area Rapid Transit Police Department Triple: [Johannes Mehserle, employer, Bay Area Rapid Transit Police Department]
Generated description
The Bay Area Rapid Transit Police Department is the law enforcement agency responsible for policing the Bay Area Rapid Transit (BART) system in the San Francisco Bay Area.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Bay Area Rapid Transit Police Department Target entity description: The Bay Area Rapid Transit Police Department is the law enforcement agency responsible for policing the Bay Area Rapid Transit (BART) system in the San Francisco Bay Area.
-
A.
San Francisco Police Department
The San Francisco Police Department is the municipal law enforcement agency responsible for public safety, crime prevention, and policing within the city and county of San Francisco, California.
-
B.
San Francisco Sheriff’s Office
The San Francisco Sheriff’s Office is the county law enforcement agency responsible for operating jails, providing court security, and performing civil and custody-related duties within the City and County of San Francisco.
-
C.
San Jose Police Department
The San Jose Police Department is the municipal law enforcement agency responsible for policing and public safety in the city of San Jose, California.
-
D.
East Palo Alto Police Department
The East Palo Alto Police Department is the municipal law enforcement agency responsible for public safety and crime prevention within the city of East Palo Alto, California.
-
E.
Oakland Police Department
The Oakland Police Department is the municipal law enforcement agency responsible for policing the city of Oakland, California.
- 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_69d6ada166c48190b902972cd2408fa3 |
completed | April 8, 2026, 7:33 p.m. |
| NER | Named-entity recognition | batch_69d94d8dc0f881908a3da736d8947ce1 |
completed | April 10, 2026, 7:20 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69f63f0911a08190ba84a20950762e68 |
completed | May 2, 2026, 6:14 p.m. |
| NEDg | Description generation | batch_69f640ef7dd08190bf78d04cffac1a44 |
completed | May 2, 2026, 6:22 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69f641abe114819093d99a327f2220c2 |
completed | May 2, 2026, 6:25 p.m. |
Created at: April 8, 2026, 9:55 p.m.