Triple
T16758659
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | BART Green Line |
E407276
|
entity |
| Predicate | usesRollingStock |
P5426
|
FINISHED |
| Object |
BART C1 cars
BART C1 cars are a series of electric multiple unit railcars used in the San Francisco Bay Area’s BART system, known for their aluminum bodies and high-platform rapid transit design.
|
E1231490
|
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 C1 cars | Statement: [BART Green Line, usesRollingStock, BART C1 cars]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: BART C1 cars Context triple: [BART Green Line, usesRollingStock, BART C1 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.
R143 subway cars
The R143 subway cars are a class of New York City Subway rolling stock built in the early 2000s, primarily used on the BMT Canarsie Line and known for introducing modern features like electronic signage and automated announcements.
-
C.
CAF cars
CAF cars are electric multiple-unit subway trains manufactured by the Spanish company Construcciones y Auxiliar de Ferrocarriles (CAF) and used for passenger service on urban metro systems.
-
D.
CTA 7000-series railcars
The CTA 7000-series railcars are a modern generation of Chicago Transit Authority rapid transit vehicles designed to replace older fleets with improved performance, accessibility, and passenger amenities.
-
E.
Metroliner EMU cars
The Metroliner EMU cars were high-speed electric multiple-unit passenger railcars built in the late 1960s for service on the Northeast Corridor, intended to modernize and accelerate intercity rail travel in the United States.
- 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 C1 cars Triple: [BART Green Line, usesRollingStock, BART C1 cars]
Generated description
BART C1 cars are a series of electric multiple unit railcars used in the San Francisco Bay Area’s BART system, known for their aluminum bodies and high-platform rapid transit design.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: BART C1 cars Target entity description: BART C1 cars are a series of electric multiple unit railcars used in the San Francisco Bay Area’s BART system, known for their aluminum bodies and high-platform rapid transit design.
-
A.
BART A/2 cars
chosen
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.
R143 subway cars
The R143 subway cars are a class of New York City Subway rolling stock built in the early 2000s, primarily used on the BMT Canarsie Line and known for introducing modern features like electronic signage and automated announcements.
-
C.
CAF cars
CAF cars are electric multiple-unit subway trains manufactured by the Spanish company Construcciones y Auxiliar de Ferrocarriles (CAF) and used for passenger service on urban metro systems.
-
D.
CTA 7000-series railcars
The CTA 7000-series railcars are a modern generation of Chicago Transit Authority rapid transit vehicles designed to replace older fleets with improved performance, accessibility, and passenger amenities.
-
E.
Metroliner EMU cars
The Metroliner EMU cars were high-speed electric multiple-unit passenger railcars built in the late 1960s for service on the Northeast Corridor, intended to modernize and accelerate intercity rail travel in the United States.
- F. None of above.
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_6a00b283a9808190ba76110cf3c7f3a9 |
completed | May 10, 2026, 4:29 p.m. |
| NEDg | Description generation | batch_6a00b31a57388190b90faa66f9483661 |
completed | May 10, 2026, 4:32 p.m. |
| NED2 | Entity disambiguation (via description) | batch_6a00b38a31e08190b92a37cb611043df |
completed | May 10, 2026, 4:34 p.m. |
Created at: April 10, 2026, 5:21 a.m.