Triple
T20484083
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | 91/PV Line |
E502539
|
entity |
| Predicate | operator |
P179
|
FINISHED |
| Object |
Southern California Regional Rail Authority
The Southern California Regional Rail Authority is the public agency that oversees and operates Metrolink, the commuter rail system serving the Greater Los Angeles region.
|
E1434634
|
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: [91/PV Line, operator, 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: [91/PV Line, operator, Southern California Regional Rail Authority]
-
A.
Southern California Regional Rail Authority Board
The Southern California Regional Rail Authority Board is the governing body that oversees policy, planning, and operations for Metrolink commuter rail service across Southern California.
-
B.
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.
-
C.
Southern California Regional Rail Network
The Southern California Regional Rail Network is a commuter rail system serving the Greater Los Angeles area and surrounding counties, connecting suburban communities with major urban centers.
-
D.
Alameda Corridor Transportation Authority
The Alameda Corridor Transportation Authority is a public agency that developed and manages the Alameda Corridor freight rail expressway linking the Ports of Los Angeles and Long Beach to the national rail network.
-
E.
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.
- 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: [91/PV Line, operator, Southern California Regional Rail Authority]
Generated description
The Southern California Regional Rail Authority is the public agency that oversees and operates Metrolink, the commuter rail system serving the Greater Los Angeles region.
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 operates Metrolink, the commuter rail system serving the Greater Los Angeles region.
-
A.
Southern California Regional Rail Authority Board
The Southern California Regional Rail Authority Board is the governing body that oversees policy, planning, and operations for Metrolink commuter rail service across Southern California.
-
B.
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.
-
C.
Southern California Regional Rail Network
The Southern California Regional Rail Network is a commuter rail system serving the Greater Los Angeles area and surrounding counties, connecting suburban communities with major urban centers.
-
D.
Alameda Corridor Transportation Authority
The Alameda Corridor Transportation Authority is a public agency that developed and manages the Alameda Corridor freight rail expressway linking the Ports of Los Angeles and Long Beach to the national rail network.
-
E.
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.
- 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_69e0b4af32848190aea80682b44d5d6e |
completed | April 16, 2026, 10:06 a.m. |
| NER | Named-entity recognition | batch_69e69b59ae2c8190bfa26a3f1e59b8d1 |
completed | April 20, 2026, 9:32 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_6a0893afefc881909807cd3a2eb92fcf |
completed | May 16, 2026, 3:56 p.m. |
| NEDg | Description generation | batch_6a0894753bb08190a9c07a9264b2b292 |
completed | May 16, 2026, 3:59 p.m. |
| NED2 | Entity disambiguation (via description) | batch_6a08952b742c8190b00f806ab772e46d |
completed | May 16, 2026, 4:02 p.m. |
Created at: April 16, 2026, 11:34 a.m.