Triple
T23095698
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | MBTA commuter rail at Back Bay |
E575880
|
entity |
| Predicate | fareSystem |
P395
|
FINISHED |
| Object | MBTA fare zones |
—
|
NE NERFINISHED |
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 fare zones | Statement: [MBTA commuter rail at Back Bay, fareSystem, MBTA fare zones]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: MBTA fare zones Context triple: [MBTA commuter rail at Back Bay, fareSystem, MBTA fare zones]
-
A.
MBTA Commuter Rail fare zones
chosen
MBTA Commuter Rail fare zones are a distance-based pricing system that divides stations into concentric zones around Boston to determine commuter rail ticket and pass costs.
-
B.
MBTA rapid transit zone
The MBTA rapid transit zone is the fare and service area designation used by Boston’s subway and light rail system to organize routes, stops, and pricing within the Massachusetts Bay Transportation Authority network.
-
C.
MBTA Commuter Rail Zone 6
MBTA Commuter Rail Zone 6 is a fare zone in the Greater Boston regional rail system used to determine ticket prices for trips between outer suburban stations and central Boston.
-
D.
MBTA fare structure
The MBTA fare structure is the system of pricing and payment rules that determines how riders are charged for using Boston’s public transit services, including subways, buses, commuter rail, and ferries.
-
E.
MBTA Zone 4
MBTA Zone 4 is a commuter rail fare zone in the Massachusetts Bay Transportation Authority system that covers suburban stations located a moderate distance from downtown Boston, such as Natick Center.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Provenance (2 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_69e245c060b48190a9bd61a47a16db17 |
completed | April 17, 2026, 2:37 p.m. |
| NER | Named-entity recognition | batch_69f18de522e48190a37e6c2fda2de465 |
completed | April 29, 2026, 4:49 a.m. |
Created at: April 17, 2026, 3:57 p.m.