Triple
T14433715
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | MBTA Red Line 1700 series cars |
E357899
|
entity |
| Predicate | serviceArea |
P82
|
FINISHED |
| Object | South Shore corridor via Braintree Branch |
E385302
|
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: South Shore corridor via Braintree Branch | Statement: [MBTA Red Line 1700 series cars, serviceArea, South Shore corridor via Braintree Branch]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: South Shore corridor via Braintree Branch Context triple: [MBTA Red Line 1700 series cars, serviceArea, South Shore corridor via Braintree Branch]
-
A.
Red Line Alewife branch
The Red Line Alewife branch is a segment of Boston's MBTA Red Line rapid transit system that runs through Cambridge and surrounding areas, terminating at Alewife station.
-
B.
Dorchester Branch rail corridor
The Dorchester Branch rail corridor is a commuter rail line in Boston, Massachusetts, that runs through the Dorchester neighborhood and connects several local stations to the broader regional rail network.
-
C.
Green Line West Branch
The Green Line West Branch is a segment of Chicago's 'L' rapid transit system that carries Green Line trains between Harlem/Lake and Ashland/63rd on the city's West Side.
-
D.
Ashmont–Braintree branch of the Red Line
chosen
The Ashmont–Braintree branch of the Red Line is a major rapid transit corridor of Boston’s MBTA system, running south from downtown Boston to the suburbs of Ashmont and Braintree.
-
E.
Middleborough/Lakeville Line
The Middleborough/Lakeville Line is a Massachusetts Bay Transportation Authority commuter rail route serving Boston and southeastern Massachusetts communities including Middleborough and Lakeville.
- 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_69d8279402a88190821ffa39ae15bccf |
completed | April 9, 2026, 10:26 p.m. |
| NER | Named-entity recognition | batch_69de91471a648190adb7b283a6a85c3e |
completed | April 14, 2026, 7:11 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69fd5bd5b1d08190a89e6f004a94b361 |
completed | May 8, 2026, 3:43 a.m. |
Created at: April 10, 2026, 1:18 a.m.