Triple
T1193826
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Back Bay |
E25621
|
entity |
| Predicate | servedBy |
P82
|
FINISHED |
| Object | MBTA Commuter Rail |
E30305
|
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 Commuter Rail | Statement: [Back Bay, servedBy, MBTA Commuter Rail]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: MBTA Commuter Rail Context triple: [Back Bay, servedBy, MBTA Commuter Rail]
-
A.
MBTA Commuter Rail network
chosen
The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
-
B.
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.
-
C.
MBTA Commuter Rail Greenbush Line
The MBTA Commuter Rail Greenbush Line is a Massachusetts Bay Transportation Authority commuter rail route connecting Boston’s South Station with coastal South Shore communities, including towns such as Hingham, Cohasset, and Scituate.
-
D.
MBTA Silver Line
The MBTA Silver Line is a bus rapid transit service in Boston that operates in dedicated lanes and tunnels, linking key neighborhoods, Logan Airport, and South Station.
-
E.
MBTA Commuter Rail Kingston Line
The MBTA Commuter Rail Kingston Line is a Massachusetts Bay Transportation Authority rail line providing commuter service between Boston and the South Shore, terminating in Kingston, 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_69a49429f5ec8190a6a205eb0ae81e5e |
completed | March 1, 2026, 7:31 p.m. |
| NER | Named-entity recognition | batch_69a4bd7743548190a70d3f3c7378aaa7 |
completed | March 1, 2026, 10:28 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69ae5d73c10c8190a059c3ae6b3a6279 |
completed | March 9, 2026, 5:41 a.m. |
Created at: March 1, 2026, 7:46 p.m.