Triple

T16315289
Position Surface form Disambiguated ID Type / Status
Subject Pennsylvania trolley gauge E396156 entity
Predicate historicallyUsedBy P2834 FINISHED
Object Chester streetcar system
The Chester streetcar system was a historic electric trolley network that once provided urban public transit service in and around Chester, Pennsylvania.
 E1209058 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: Chester streetcar system | Statement: [Pennsylvania trolley gauge, historicallyUsedBy, Chester streetcar system]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Chester streetcar system
Context triple: [Pennsylvania trolley gauge, historicallyUsedBy, Chester streetcar system]
  • A. Lancaster streetcar system
    The Lancaster streetcar system was a historic electric trolley network that once provided urban and interurban public transit service in and around Lancaster, Pennsylvania.
  • B. York streetcar system
    The York streetcar system was a historic electric trolley network that once provided urban public transit service in York, Pennsylvania.
  • C. Sharon streetcar system
    The Sharon streetcar system was a historic electric trolley network that once served the city of Sharon, Pennsylvania and its surrounding area.
  • D. Portland Streetcar
    Portland Streetcar is a modern urban streetcar transit system serving central Portland, Oregon, connecting key neighborhoods, employment centers, and educational institutions.
  • E. College Street streetcar
    The College Street streetcar is a Toronto Transit Commission streetcar route that runs along College Street, serving key downtown neighborhoods including the Discovery District.
  • 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: Chester streetcar system
Triple: [Pennsylvania trolley gauge, historicallyUsedBy, Chester streetcar system]
Generated description
The Chester streetcar system was a historic electric trolley network that once provided urban public transit service in and around Chester, Pennsylvania.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Chester streetcar system
Target entity description: The Chester streetcar system was a historic electric trolley network that once provided urban public transit service in and around Chester, Pennsylvania.
  • A. Lancaster streetcar system
    The Lancaster streetcar system was a historic electric trolley network that once provided urban and interurban public transit service in and around Lancaster, Pennsylvania.
  • B. York streetcar system
    The York streetcar system was a historic electric trolley network that once provided urban public transit service in York, Pennsylvania.
  • C. Sharon streetcar system
    The Sharon streetcar system was a historic electric trolley network that once served the city of Sharon, Pennsylvania and its surrounding area.
  • D. Portland Streetcar
    Portland Streetcar is a modern urban streetcar transit system serving central Portland, Oregon, connecting key neighborhoods, employment centers, and educational institutions.
  • E. College Street streetcar
    The College Street streetcar is a Toronto Transit Commission streetcar route that runs along College Street, serving key downtown neighborhoods including the Discovery District.
  • 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_69d87f255b788190a400eba031dd85d8 completed April 10, 2026, 4:40 a.m.
NER Named-entity recognition batch_69e288de57cc81908cec93309347c385 completed April 17, 2026, 7:24 p.m.
NED1 Entity disambiguation (via context triple) batch_6a002da444408190b770055d84060f4d completed May 10, 2026, 7:03 a.m.
NEDg Description generation batch_6a002ec2fd948190878af958d0b90ce6 completed May 10, 2026, 7:07 a.m.
NED2 Entity disambiguation (via description) batch_6a00312a4fc48190b6bd6ad9db71bb4d completed May 10, 2026, 7:18 a.m.
Created at: April 10, 2026, 5:06 a.m.