Triple
T15890419
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Ashmont–Braintree branch of the Red Line |
E385302
|
entity |
| Predicate | connectsWith |
P37
|
FINISHED |
| Object | MBTA Commuter Rail at South Station |
E570980
|
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 at South Station | Statement: [Ashmont–Braintree branch of the Red Line, connectsWith, MBTA Commuter Rail at South Station]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: MBTA Commuter Rail at South Station Context triple: [Ashmont–Braintree branch of the Red Line, connectsWith, MBTA Commuter Rail at South Station]
-
A.
MBTA Commuter Rail at South Station
chosen
MBTA Commuter Rail at South Station is the regional rail service hub in downtown Boston that provides commuter train connections between the city and surrounding suburbs and cities across Massachusetts and neighboring states.
-
B.
MBTA Commuter Rail at North Station
MBTA Commuter Rail at North Station is a major Boston rail hub where regional trains connect downtown with numerous suburbs and outlying cities across Massachusetts.
-
C.
MBTA Red Line at South Station
The MBTA Red Line at South Station is a major rapid transit stop in downtown Boston that serves as a key hub for subway, commuter rail, intercity rail, and bus connections.
-
D.
MBTA Silver Line at South Station
The MBTA Silver Line at South Station is a key Boston bus rapid transit hub providing underground and surface connections between South Station and destinations including the Seaport District and Logan Airport.
-
E.
Amtrak at South Station
Amtrak at South Station is the intercity passenger rail service operating from Boston’s historic South Station, providing regional and long-distance train connections along the Northeast Corridor and beyond.
- 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_69d86da5b800819083a31be937d738b0 |
completed | April 10, 2026, 3:25 a.m. |
| NER | Named-entity recognition | batch_69e1561e5ac481908ead7de3140c769d |
completed | April 16, 2026, 9:35 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69ffb047b6248190b6c11ef20636f50f |
completed | May 9, 2026, 10:08 p.m. |
Created at: April 10, 2026, 4:51 a.m.