Triple

T1573560
Position Surface form Disambiguated ID Type / Status
Subject AC Transit E33595 entity
Predicate replaced P101 FINISHED
Object Key System Transit Lines
Key System Transit Lines was a privately operated streetcar and bus network that once served the San Francisco Bay Area, particularly the East Bay, before being dismantled in the mid-20th century.
 E179551 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: Key System Transit Lines | Statement: [AC Transit, replaced, Key System Transit Lines]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Key System Transit Lines
Context triple: [AC Transit, replaced, Key System Transit Lines]
  • A. Transitway
    Transitway is a bus rapid transit network in Ottawa, Ontario, providing high-capacity, grade-separated transit service across the city.
  • B. Metropolitan Transit System
    The Metropolitan Transit System is the primary public transportation agency serving the San Diego region, operating buses, trolleys, and related transit services.
  • C. MetroAccess
    MetroAccess is a paratransit service providing door-to-door transportation for people with disabilities in the Washington, D.C. metropolitan area.
  • D. Metro Rail
    Metro Rail is the urban rapid transit rail system serving Los Angeles County, providing light rail and subway services across the region.
  • E. Loop transportation system
    The Loop transportation system is The Boring Company’s proposed network of underground tunnels using autonomous electric vehicles to move passengers rapidly and bypass surface traffic congestion.
  • 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: Key System Transit Lines
Triple: [AC Transit, replaced, Key System Transit Lines]
Generated description
Key System Transit Lines was a privately operated streetcar and bus network that once served the San Francisco Bay Area, particularly the East Bay, before being dismantled in the mid-20th century.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Key System Transit Lines
Target entity description: Key System Transit Lines was a privately operated streetcar and bus network that once served the San Francisco Bay Area, particularly the East Bay, before being dismantled in the mid-20th century.
  • A. Transitway
    Transitway is a bus rapid transit network in Ottawa, Ontario, providing high-capacity, grade-separated transit service across the city.
  • B. Metropolitan Transit System
    The Metropolitan Transit System is the primary public transportation agency serving the San Diego region, operating buses, trolleys, and related transit services.
  • C. MetroAccess
    MetroAccess is a paratransit service providing door-to-door transportation for people with disabilities in the Washington, D.C. metropolitan area.
  • D. Metro Rail
    Metro Rail is the urban rapid transit rail system serving Los Angeles County, providing light rail and subway services across the region.
  • E. Loop transportation system
    The Loop transportation system is The Boring Company’s proposed network of underground tunnels using autonomous electric vehicles to move passengers rapidly and bypass surface traffic congestion.
  • 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_69a885f27a4c8190a4622252cdf54c00 completed March 4, 2026, 7:20 p.m.
NER Named-entity recognition batch_69a908bb9c648190933fd19bcc1cb9a4 completed March 5, 2026, 4:38 a.m.
NED1 Entity disambiguation (via context triple) batch_69ad4028bc5881909dbe847229dd63bb completed March 8, 2026, 9:23 a.m.
NEDg Description generation batch_69ad41930d208190b34531e3f35fa58b completed March 8, 2026, 9:29 a.m.
NED2 Entity disambiguation (via description) batch_69ad422752348190b42ebc3781a6e8a5 completed March 8, 2026, 9:32 a.m.
Created at: March 4, 2026, 7:27 p.m.