Triple

T16758660
Position Surface form Disambiguated ID Type / Status
Subject BART Green Line E407276 entity
Predicate usesRollingStock P5426 FINISHED
Object BART C2 cars
BART C2 cars are a later-generation series of Bay Area Rapid Transit rail vehicles designed to expand and modernize the system’s electric multiple-unit fleet.
E1236428 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: BART C2 cars | Statement: [BART Green Line, usesRollingStock, BART C2 cars]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: BART C2 cars
Context triple: [BART Green Line, usesRollingStock, BART C2 cars]
  • A. BART A/2 cars
    BART A/2 cars are an early-generation series of electric multiple unit railcars used on the San Francisco Bay Area Rapid Transit system.
  • B. 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.
  • C. CTA 2400-series railcars
    The CTA 2400-series railcars were an earlier generation of Chicago Transit Authority rapid transit cars that served as a key workhorse of the “L” system before being succeeded by later series.
  • D. 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.
  • E. 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.
  • 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: BART C2 cars
Triple: [BART Green Line, usesRollingStock, BART C2 cars]
Generated description
BART C2 cars are a later-generation series of Bay Area Rapid Transit rail vehicles designed to expand and modernize the system’s electric multiple-unit fleet.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: BART C2 cars
Target entity description: BART C2 cars are a later-generation series of Bay Area Rapid Transit rail vehicles designed to expand and modernize the system’s electric multiple-unit fleet.
  • A. BART A/2 cars
    BART A/2 cars are an early-generation series of electric multiple unit railcars used on the San Francisco Bay Area Rapid Transit system.
  • B. 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.
  • C. CTA 2400-series railcars
    The CTA 2400-series railcars were an earlier generation of Chicago Transit Authority rapid transit cars that served as a key workhorse of the “L” system before being succeeded by later series.
  • D. 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.
  • E. 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.
  • 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_69d8839174188190909f190097207065 completed April 10, 2026, 4:58 a.m.
NER Named-entity recognition batch_69e3abea156c8190a5ee6d0028471810 completed April 18, 2026, 4:06 p.m.
NED1 Entity disambiguation (via context triple) batch_6a00bb069cf481908e029b26ad96d3b5 completed May 10, 2026, 5:06 p.m.
NEDg Description generation batch_6a00bc136bfc8190ab93cd8e0e7eaf1c completed May 10, 2026, 5:10 p.m.
NED2 Entity disambiguation (via description) batch_6a00bca0a3808190be3d1d7ebd77cc20 completed May 10, 2026, 5:13 p.m.
Created at: April 10, 2026, 5:21 a.m.