Triple
T9557611
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Broadway station (MBTA) |
E230579
|
entity |
| Predicate | formerOperator |
P179
|
FINISHED |
| Object | Metropolitan Transit Authority (Boston) |
E21867
|
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: Metropolitan Transit Authority (Boston) | Statement: [Broadway station (MBTA), formerOperator, Metropolitan Transit Authority (Boston)]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Metropolitan Transit Authority (Boston) Context triple: [Broadway station (MBTA), formerOperator, Metropolitan Transit Authority (Boston)]
-
A.
MBTA
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
MBTA is a landmark U.S. federal law enacted in 1918 that protects migratory bird species by prohibiting their unauthorized capture, killing, or trade.
-
C.
MetroWest Regional Transit Authority
MetroWest Regional Transit Authority is a public transportation agency that operates local bus and paratransit services in the MetroWest region of Massachusetts.
-
D.
Metropolitan Transit Authority
chosen
The Metropolitan Transit Authority was a former public agency that operated and managed mass transit services in the Boston metropolitan area before being succeeded by the MBTA.
-
E.
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.
- 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_69ca847e53a88190a60eed7e02257f10 |
completed | March 30, 2026, 2:11 p.m. |
| NER | Named-entity recognition | batch_69cd99487b4c819086e02e29e37b593f |
completed | April 1, 2026, 10:16 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69d15296303c8190adda4b24036d9390 |
completed | April 4, 2026, 6:04 p.m. |
Created at: March 30, 2026, 8:03 p.m.