Triple
T8015645
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Main Line Elevated |
E186607
|
entity |
| Predicate | ownedBy |
P347
|
FINISHED |
| Object | Massachusetts Bay Transportation Authority (final period) |
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: Massachusetts Bay Transportation Authority (final period) | Statement: [Main Line Elevated, ownedBy, Massachusetts Bay Transportation Authority (final period)]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Massachusetts Bay Transportation Authority (final period) Context triple: [Main Line Elevated, ownedBy, Massachusetts Bay Transportation Authority (final period)]
-
A.
Massachusetts Bay Transportation Trust Fund
The Massachusetts Bay Transportation Trust Fund is a dedicated financial resource used to support and sustain public transportation services in Massachusetts.
-
B.
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.
-
C.
MBTA
MBTA is a landmark U.S. federal law enacted in 1918 that protects migratory bird species by prohibiting their unauthorized capture, killing, or trade.
-
D.
MBTA Fiscal and Management Control Board
The MBTA Fiscal and Management Control Board was a special oversight body created by Massachusetts to stabilize, reform, and improve the finances and operations of the Massachusetts Bay Transportation Authority.
-
E.
MBTA Mattapan Line
The MBTA Mattapan Line is a light rail trolley service in the Boston area that operates historic streetcars between Ashmont Station and Mattapan, serving neighborhoods in Boston and Milton.
- 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_69ca82ac7fc081909b1398cf025423af |
completed | March 30, 2026, 2:03 p.m. |
| NER | Named-entity recognition | batch_69cb3df24e4c8190ae1c46e97e54787d |
completed | March 31, 2026, 3:22 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69cc93a8923081908402951d6490f8de |
completed | April 1, 2026, 3:40 a.m. |
Created at: March 30, 2026, 5:20 p.m.