Triple

T4414642
Position Surface form Disambiguated ID Type / Status
Subject CTA 5000-series railcars E94934 entity
Predicate replacedRollingStock P14642 FINISHED
Object CTA 2200-series railcars
The CTA 2200-series railcars were a fleet of Chicago 'L' rapid transit cars built in the late 1960s, notable for their fluted stainless-steel sides and “blinker” door configuration, which served the system for several decades before retirement.
 E437012 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: CTA 2200-series railcars | Statement: [CTA 5000-series railcars, replacedRollingStock, CTA 2200-series railcars]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: CTA 2200-series railcars
Context triple: [CTA 5000-series railcars, replacedRollingStock, CTA 2200-series railcars]
  • A. CTA 2600-series railcars
    The CTA 2600-series railcars are a fleet of Chicago 'L' rapid transit cars introduced in the 1980s, known for their stainless-steel bodies and long service on multiple lines in the system.
  • B. CTA 3200-series railcars
    The CTA 3200-series railcars are a fleet of Chicago "L" rapid transit cars introduced in the early 1990s, known for serving lines such as the Orange Line with modernized features compared to earlier series.
  • C. CTA 5000-series railcars
    The CTA 5000-series railcars are a modern generation of Chicago "L" rapid transit cars featuring improved accessibility, digital signage, and enhanced passenger comfort and safety systems.
  • D. Bombardier Flexity Classic
    The Bombardier Flexity Classic is a family of low-floor, multi-section trams used in various cities worldwide, designed for reliable, accessible urban light rail service.
  • E. Bombardier Flexity Swift
    The Bombardier Flexity Swift is a family of modular, high-floor light rail and tram vehicles designed for rapid transit operations in urban and suburban networks worldwide.
  • 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: CTA 2200-series railcars
Triple: [CTA 5000-series railcars, replacedRollingStock, CTA 2200-series railcars]
Generated description
The CTA 2200-series railcars were a fleet of Chicago 'L' rapid transit cars built in the late 1960s, notable for their fluted stainless-steel sides and “blinker” door configuration, which served the system for several decades before retirement.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: CTA 2200-series railcars
Target entity description: The CTA 2200-series railcars were a fleet of Chicago 'L' rapid transit cars built in the late 1960s, notable for their fluted stainless-steel sides and “blinker” door configuration, which served the system for several decades before retirement.
  • A. CTA 2600-series railcars
    The CTA 2600-series railcars are a fleet of Chicago 'L' rapid transit cars introduced in the 1980s, known for their stainless-steel bodies and long service on multiple lines in the system.
  • B. CTA 3200-series railcars
    The CTA 3200-series railcars are a fleet of Chicago "L" rapid transit cars introduced in the early 1990s, known for serving lines such as the Orange Line with modernized features compared to earlier series.
  • C. CTA 5000-series railcars
    The CTA 5000-series railcars are a modern generation of Chicago "L" rapid transit cars featuring improved accessibility, digital signage, and enhanced passenger comfort and safety systems.
  • D. Bombardier Flexity Classic
    The Bombardier Flexity Classic is a family of low-floor, multi-section trams used in various cities worldwide, designed for reliable, accessible urban light rail service.
  • E. Bombardier Flexity Swift
    The Bombardier Flexity Swift is a family of modular, high-floor light rail and tram vehicles designed for rapid transit operations in urban and suburban networks worldwide.
  • 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_69b34539638c8190abfea3eb29425210 completed March 12, 2026, 10:59 p.m.
NER Named-entity recognition batch_69b354e940d48190b49cca6796d60de4 completed March 13, 2026, 12:06 a.m.
NED1 Entity disambiguation (via context triple) batch_69b5f617012481908b8f1a9a1bc5efaf completed March 14, 2026, 11:58 p.m.
NEDg Description generation batch_69b5f674c94c81908327336dd4380d2e completed March 14, 2026, 11:59 p.m.
NED2 Entity disambiguation (via description) batch_69b5f719d008819090a35e3597a0089f completed March 15, 2026, 12:02 a.m.
Created at: March 12, 2026, 11:29 p.m.