Triple
T19711689
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Milton via Mattapan Line |
E473362
|
entity |
| Predicate | partOf |
P40
|
FINISHED |
| Object | Boston metropolitan area transit system |
—
|
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: Boston metropolitan area transit system | Statement: [Milton via Mattapan Line, partOf, Boston metropolitan area transit system]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Boston metropolitan area transit system Context triple: [Milton via Mattapan Line, partOf, Boston metropolitan area transit system]
-
A.
Portland metropolitan transit system
The Portland metropolitan transit system is the integrated public transportation network serving the Portland, Oregon region, encompassing buses, light rail, streetcars, and related transit corridors.
-
B.
Philadelphia commuter rail network
The Philadelphia commuter rail network is a regional passenger rail system serving the greater Philadelphia area, primarily operated by SEPTA and connecting the city with its surrounding suburbs.
-
C.
Boston transportation network
The Boston transportation network is an integrated system of subway, commuter rail, bus, and roadway infrastructure that connects neighborhoods within Boston and links the city to the greater New England region.
-
D.
Boston subway
chosen
The Boston subway, officially known as the MBTA or "the T," is one of the oldest public transit systems in the United States, serving the Greater Boston area with an extensive network of underground and surface rail lines.
-
E.
Massachusetts regional transit authorities system
The Massachusetts regional transit authorities system is a network of locally governed public transportation agencies that provide bus and paratransit services across regions outside the core MBTA service area in the state.
- 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_69d8e516dd048190a0b6c93ea3e71f58 |
completed | April 10, 2026, 11:55 a.m. |
| NER | Named-entity recognition | batch_69e64408bde08190aa3bef8516491e03 |
completed | April 20, 2026, 3:19 p.m. |
Created at: April 10, 2026, 1:46 p.m.