Triple
T38430
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | MBTA Red Line |
E761
|
entity |
| Predicate | system |
P730
|
FINISHED |
| Object | MBTA subway |
E2866
|
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 subway | Statement: [MBTA Red Line, system, MBTA subway]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: MBTA subway Context triple: [MBTA Red Line, system, MBTA subway]
-
A.
MBTA
chosen
The MBTA (Massachusetts Bay Transportation Authority) is the public transit agency that operates subway, bus, commuter rail, and ferry services in the Greater Boston area.
-
B.
MBTA Red Line
The MBTA Red Line is a major rapid transit line in the Boston metropolitan area that runs through key communities including Cambridge, connecting them to downtown Boston and other parts of the region.
-
C.
MBTA Orange Line
The MBTA Orange Line is a rapid transit line in the Boston metropolitan area that runs roughly north–south, connecting neighborhoods such as Jamaica Plain, Downtown Boston, and Malden.
-
D.
MBTA bus network
The MBTA bus network is the system of public bus routes serving Cambridge and the greater Boston area as part of the Massachusetts Bay Transportation Authority’s regional transit services.
-
E.
MBTA Green Line E branch
The MBTA Green Line E branch is a light rail line in Boston that runs from downtown through the Back Bay and Longwood Medical Area to Heath Street, serving major hospitals, universities, and residential neighborhoods.
- 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_69a247a8f6c08190bac804906d62ed5a |
completed | Feb. 28, 2026, 1:40 a.m. |
| NER | Named-entity recognition | batch_69a24acd14b48190b80d4329621583df |
completed | Feb. 28, 2026, 1:54 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69a30cc17d088190ab19e1b36d159bad |
completed | Feb. 28, 2026, 3:41 p.m. |
Created at: Feb. 28, 2026, 1:46 a.m.