Triple
T18880579
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | UC San Diego Blue Line |
E461814
|
entity |
| Predicate | extensionName |
P133308
|
FINISHED |
| Object | Mid-Coast Trolley extension |
—
|
NE NERFINISHED |
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: Mid-Coast Trolley extension | Statement: [UC San Diego Blue Line, extensionName, Mid-Coast Trolley extension]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Mid-Coast Trolley extension Context triple: [UC San Diego Blue Line, extensionName, Mid-Coast Trolley extension]
-
A.
Pittsburgh Light Rail North Shore extension
The Pittsburgh Light Rail North Shore extension is a light rail project that expanded service from downtown Pittsburgh to the city’s North Shore, improving transit access to major sports and entertainment venues along the Allegheny River.
-
B.
Southwest LRT Green Line extension
The Southwest LRT Green Line extension is a planned light rail transit project in the Minneapolis–Saint Paul metropolitan area that will expand the existing Green Line service to connect downtown Minneapolis with southwestern suburbs including Eden Prairie.
-
C.
Green Line southern extension
The Green Line southern extension is a Washington Metro expansion project that extended the Green Line further into the suburbs of Prince George's County, Maryland, adding several new stations beyond its previous terminus.
-
D.
Green Line Extension
The Green Line Extension is a Massachusetts Bay Transportation Authority light rail project that extends Boston’s Green Line service into previously unserved neighborhoods in Somerville and Medford.
-
E.
Red Line Valley extension
Red Line Valley extension is the segment of Los Angeles Metro’s Red Line subway that was built to extend service into the San Fernando Valley, terminating in North Hollywood.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Mid-Coast Trolley extension Target entity description: The Mid-Coast Trolley extension is a San Diego light rail project that expanded service of the UC San Diego Blue Line northward to connect downtown with the university and surrounding communities.
-
A.
Pittsburgh Light Rail North Shore extension
The Pittsburgh Light Rail North Shore extension is a light rail project that expanded service from downtown Pittsburgh to the city’s North Shore, improving transit access to major sports and entertainment venues along the Allegheny River.
-
B.
Southwest LRT Green Line extension
The Southwest LRT Green Line extension is a planned light rail transit project in the Minneapolis–Saint Paul metropolitan area that will expand the existing Green Line service to connect downtown Minneapolis with southwestern suburbs including Eden Prairie.
-
C.
Green Line southern extension
The Green Line southern extension is a Washington Metro expansion project that extended the Green Line further into the suburbs of Prince George's County, Maryland, adding several new stations beyond its previous terminus.
-
D.
Green Line Extension
The Green Line Extension is a Massachusetts Bay Transportation Authority light rail project that extends Boston’s Green Line service into previously unserved neighborhoods in Somerville and Medford.
-
E.
Red Line Valley extension
Red Line Valley extension is the segment of Los Angeles Metro’s Red Line subway that was built to extend service into the San Fernando Valley, terminating in North Hollywood.
- F. None of above. chosen
PD
Predicate disambiguation
gpt-5-mini-2025-08-07
Target predicate: extensionName Context triple: [UC San Diego Blue Line, extensionName, Mid-Coast Trolley extension]
-
A.
extensionType
Indicates the specific kind or category of extension that characterizes how something is extended or augmented beyond its base form.
-
B.
extension
Indicates that one entity is a lengthening, continuation, or added part of another entity beyond its original limits.
-
C.
extensionTypeValue
Indicates the specific kind or category assigned as the value for an extension.
-
D.
formerExtension
Indicates that one entity previously served as an extension or subsidiary part of another entity, but no longer holds that status.
-
E.
extensionTerminus
Indicates the endpoint or final limit to which something is extended or continues.
- F. None of above. chosen
Provenance (4 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_69d8dcfc3430819095ee6fc0eb4c06a5 |
completed | April 10, 2026, 11:20 a.m. |
| NER | Named-entity recognition | batch_69e5c3d133f08190a482e601c1866662 |
completed | April 20, 2026, 6:12 a.m. |
| PD | Predicate disambiguation | batch_69e48d22dde8819093b1d963bd673365 |
completed | April 19, 2026, 8:06 a.m. |
| PDg | Predicate description generation | batch_69e4978813d081908eaf25bb727fc6cf |
completed | April 19, 2026, 8:51 a.m. |
Created at: April 10, 2026, 11:57 a.m.