Triple
T16758658
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | BART Green Line |
E407276
|
entity |
| Predicate | usesRollingStock |
P5426
|
FINISHED |
| Object | BART B/2 cars |
E1231490
|
NE FINISHED |
How this triple was built (2 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 B/2 cars | Statement: [BART Green Line, usesRollingStock, BART B/2 cars]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: BART B/2 cars Context triple: [BART Green Line, usesRollingStock, BART B/2 cars]
-
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.
Muni Metro Breda LRV
The Muni Metro Breda LRV is a type of light rail vehicle used by San Francisco’s Muni Metro system for its modern streetcar and light rail services.
-
C.
San Francisco Muni historic streetcars
San Francisco Muni historic streetcars are a fleet of restored vintage streetcars from around the world that operate as regular public transit along San Francisco’s F-Market & Wharves and E-Embarcadero lines.
-
D.
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.
-
E.
BART
BART (Bay Area Rapid Transit) is a major rapid transit system serving the San Francisco Bay Area, linking cities like San Francisco, Oakland, and Berkeley with surrounding suburbs and regional transit networks.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Provenance (3 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_6a00aaf7908481909af31fc2d02f33fb |
completed | May 10, 2026, 3:57 p.m. |
Created at: April 10, 2026, 5:21 a.m.