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
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.
E1347312 NE FINISHED

How this triple was built (5 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.
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: Mid-Coast Trolley extension
Triple: [UC San Diego Blue Line, extensionName, Mid-Coast Trolley extension]
Generated 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.
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 (7 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.
NED1 Entity disambiguation (via context triple) batch_6a0575c37ed081908e70d965dbea09c8 completed May 14, 2026, 7:12 a.m.
NEDg Description generation batch_6a057697121481909dc6f19aa9549262 completed May 14, 2026, 7:15 a.m.
NED2 Entity disambiguation (via description) batch_6a057761268481908589088ab2f5c2e7 completed May 14, 2026, 7:18 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.