Triple
T1797571
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Metrolink (Southern California) |
E39638
|
entity |
| Predicate | ownedBy |
P347
|
FINISHED |
| Object |
Southern California Regional Rail Authority
The Southern California Regional Rail Authority is the public agency that oversees and manages Metrolink, the regional commuter rail system serving the Greater Los Angeles area and surrounding counties.
|
E203639
|
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 Regional Rail Authority | Statement: [Metrolink (Southern California), ownedBy, Southern California Regional Rail Authority]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Southern California Regional Rail Authority Context triple: [Metrolink (Southern California), ownedBy, Southern California Regional Rail Authority]
-
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.
Metrolink (Southern California)
Metrolink (Southern California) is a regional commuter rail system serving Los Angeles and surrounding counties, providing longer-distance transit connections across the Greater Los Angeles area.
-
C.
Metrolink
Metrolink is the light rail tram system serving Greater Manchester, England, connecting central Manchester with surrounding towns and key destinations across the metropolitan area.
-
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.
Metrolink Inland Empire–Orange County Line
The Metrolink Inland Empire–Orange County Line is a Southern California commuter rail route connecting cities in the Inland Empire with destinations in Orange County and beyond.
- 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 Regional Rail Authority Triple: [Metrolink (Southern California), ownedBy, Southern California Regional Rail Authority]
Generated description
The Southern California Regional Rail Authority is the public agency that oversees and manages Metrolink, the regional commuter rail system serving the Greater Los Angeles area and surrounding counties.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Southern California Regional Rail Authority Target entity description: The Southern California Regional Rail Authority is the public agency that oversees and manages Metrolink, the regional commuter rail system serving the Greater Los Angeles area and surrounding counties.
-
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.
Metrolink (Southern California)
chosen
Metrolink (Southern California) is a regional commuter rail system serving Los Angeles and surrounding counties, providing longer-distance transit connections across the Greater Los Angeles area.
-
C.
Metrolink
Metrolink is the light rail tram system serving Greater Manchester, England, connecting central Manchester with surrounding towns and key destinations across the metropolitan area.
-
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.
Metrolink Inland Empire–Orange County Line
The Metrolink Inland Empire–Orange County Line is a Southern California commuter rail route connecting cities in the Inland Empire with destinations in Orange County and beyond.
- 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_69a88632aa588190ba3978fde0db5bbd |
completed | March 4, 2026, 7:21 p.m. |
| NER | Named-entity recognition | batch_69aa6566cd808190a67f33ad47d8ca8e |
completed | March 6, 2026, 5:25 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69add1baea1c8190a452ffb17dc91aa0 |
completed | March 8, 2026, 7:44 p.m. |
| NEDg | Description generation | batch_69add2729498819082f6595c57f545a8 |
completed | March 8, 2026, 7:48 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69add32803a48190b8ff08c605790f22 |
completed | March 8, 2026, 7:51 p.m. |
Created at: March 4, 2026, 7:32 p.m.