Triple
T3998983
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Richmond–Millbrae line |
E87165
|
entity |
| Predicate | rollingStock |
P1305
|
FINISHED |
| Object | BART A series cars |
E12820
|
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 A series cars | Statement: [Richmond–Millbrae line, rollingStock, BART A series cars]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: BART A series cars Context triple: [Richmond–Millbrae line, rollingStock, BART A series cars]
-
A.
BART
chosen
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.
-
B.
B Division subway cars
B Division subway cars are the wider, longer New York City Subway rolling stock used on lettered lines, designed for higher-capacity service on the B Division routes.
-
C.
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.
-
D.
MBTA Red Line 1700 series cars
The MBTA Red Line 1700 series cars are a fleet of heavy-rail subway vehicles used on Boston’s Red Line, particularly associated with service on the Braintree Branch.
-
E.
MBTA Red Line 1800 series cars
The MBTA Red Line 1800 series cars are a fleet of heavy-rail subway vehicles used on Boston’s Red Line, featuring stainless-steel bodies and modernized interiors compared to earlier generations of MBTA rolling stock.
- 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_69aed94118148190975e6aa4e554cde9 |
completed | March 9, 2026, 2:29 p.m. |
| NER | Named-entity recognition | batch_69aefa4065ac8190a898a1025365b8e9 |
completed | March 9, 2026, 4:50 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69b54c57f60c819080e237b4b056d73b |
completed | March 14, 2026, 11:54 a.m. |
Created at: March 9, 2026, 3:34 p.m.