Triple
T649204
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Los Angeles County Metropolitan Transportation Authority |
E11307
|
entity |
| Predicate | formedByMergerOf |
P77
|
FINISHED |
| Object |
Southern California Rapid Transit District
The Southern California Rapid Transit District was the former public transportation agency serving the Los Angeles area before being succeeded by the Los Angeles County Metropolitan Transportation Authority.
|
E2263
|
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: Southern California Rapid Transit District | Statement: [Los Angeles County Metropolitan Transportation Authority, formedByMergerOf, Southern California Rapid Transit District]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Southern California Rapid Transit District Context triple: [Los Angeles County Metropolitan Transportation Authority, formedByMergerOf, Southern California Rapid Transit District]
-
A.
Los Angeles County Metropolitan Transportation Authority
The Los Angeles County Metropolitan Transportation Authority is the primary public transit agency for Los Angeles County, operating and overseeing the region’s bus and rail systems.
-
B.
North County Transit District
North County Transit District is a public transportation agency serving northern San Diego County, California, operating commuter rail, light rail, and bus services.
-
C.
Los Angeles Metro Rail
Los Angeles Metro Rail is a rapid transit system serving Los Angeles County, California, consisting of multiple light rail and subway lines that connect key neighborhoods, business districts, and regional destinations.
-
D.
Sacramento Regional Transit
Sacramento Regional Transit is the public transportation agency serving the Sacramento, California metropolitan area with light rail and bus services.
-
E.
Regional Transportation District
The Regional Transportation District is the public transit agency serving the Denver metropolitan area, operating buses, light rail, and commuter rail across much of central Colorado.
- 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: Southern California Rapid Transit District Triple: [Los Angeles County Metropolitan Transportation Authority, formedByMergerOf, Southern California Rapid Transit District]
Generated description
The Southern California Rapid Transit District was the former public transportation agency serving the Los Angeles area before being succeeded by the Los Angeles County Metropolitan Transportation Authority.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Southern California Rapid Transit District Target entity description: The Southern California Rapid Transit District was the former public transportation agency serving the Los Angeles area before being succeeded by the Los Angeles County Metropolitan Transportation Authority.
-
A.
Los Angeles County Metropolitan Transportation Authority
chosen
The Los Angeles County Metropolitan Transportation Authority is the primary public transit agency for Los Angeles County, operating and overseeing the region’s bus and rail systems.
-
B.
North County Transit District
North County Transit District is a public transportation agency serving northern San Diego County, California, operating commuter rail, light rail, and bus services.
-
C.
Los Angeles Metro Rail
Los Angeles Metro Rail is a rapid transit system serving Los Angeles County, California, consisting of multiple light rail and subway lines that connect key neighborhoods, business districts, and regional destinations.
-
D.
Sacramento Regional Transit
Sacramento Regional Transit is the public transportation agency serving the Sacramento, California metropolitan area with light rail and bus services.
-
E.
Regional Transportation District
The Regional Transportation District is the public transit agency serving the Denver metropolitan area, operating buses, light rail, and commuter rail across much of central Colorado.
- 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_69a493266a2881909daf4c40f719dee8 |
completed | March 1, 2026, 7:27 p.m. |
| NER | Named-entity recognition | batch_69a49f31e70c81909a2ac1d939f7ec07 |
completed | March 1, 2026, 8:18 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69a654d435088190b4a910dc280d13c6 |
completed | March 3, 2026, 3:26 a.m. |
| NEDg | Description generation | batch_69a65583c7a481908b3833969c30da29 |
completed | March 3, 2026, 3:29 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69a655e1e88481909e37a9911bf5ba8c |
completed | March 3, 2026, 3:30 a.m. |
Created at: March 1, 2026, 7:36 p.m.