Triple
T3265131
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Brigham Circle station |
E68506
|
entity |
| Predicate | usesRollingStock |
P5426
|
FINISHED |
| Object | MBTA Type 7 LRVs |
E34910
|
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: MBTA Type 7 LRVs | Statement: [Brigham Circle station, usesRollingStock, MBTA Type 7 LRVs]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: MBTA Type 7 LRVs Context triple: [Brigham Circle station, usesRollingStock, MBTA Type 7 LRVs]
-
A.
MBTA Type 7 Light Rail Vehicle
chosen
The MBTA Type 7 Light Rail Vehicle is a high-floor, articulated streetcar used on Boston’s Green Line, known for its distinctive design and role as one of the system’s primary light rail fleets.
-
B.
MBTA Type 8 Light Rail Vehicle
The MBTA Type 8 Light Rail Vehicle is a low-floor, articulated streetcar used on Boston’s Green Line, designed to improve accessibility and passenger capacity on the system’s light rail routes.
-
C.
MBTA Type 9 Light Rail Vehicle
The MBTA Type 9 Light Rail Vehicle is a modern, low-floor streetcar used on Boston’s Green Line that features improved accessibility, passenger comfort, and energy efficiency compared to earlier MBTA light rail fleets.
-
D.
MBTA Green Line rolling stock
MBTA Green Line rolling stock comprises the light rail vehicles used on Boston’s Green Line, including multiple generations of trolleys that serve as the backbone of the city’s surface and subway light rail service.
-
E.
MBTA Commuter Rail coaches
MBTA Commuter Rail coaches are bi-level and single-level passenger railcars used by the Massachusetts Bay Transportation Authority to provide regional rail service across Greater Boston and surrounding areas.
- 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_69ad8590444081909e8107a8aeef3a23 |
completed | March 8, 2026, 2:20 p.m. |
| NER | Named-entity recognition | batch_69adafcb2da08190a7f4fefdfe6d0098 |
completed | March 8, 2026, 5:20 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69b28ee82a78819082582a24bac97f44 |
completed | March 12, 2026, 10:01 a.m. |
Created at: March 8, 2026, 3:09 p.m.