Triple
T3404423
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | MBTA Braintree Branch |
E71735
|
entity |
| Predicate | connectsWith |
P37
|
FINISHED |
| Object | MBTA Commuter Rail at JFK/UMass |
E177251
|
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 JFK/UMass | Statement: [MBTA Braintree Branch, connectsWith, MBTA Commuter Rail at JFK/UMass]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: MBTA Commuter Rail at JFK/UMass Context triple: [MBTA Braintree Branch, connectsWith, MBTA Commuter Rail at JFK/UMass]
-
A.
MBTA Commuter Rail (Old Colony Lines at JFK/UMass)
chosen
MBTA Commuter Rail (Old Colony Lines at JFK/UMass) is a set of commuter rail services connecting Boston’s JFK/UMass station to southeastern Massachusetts communities along the restored Old Colony rail corridors.
-
B.
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.
-
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 Commuter Rail network
The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
-
E.
MBTA Braintree Branch
The MBTA Braintree Branch is a southern extension of Boston’s Red Line rapid transit system that runs from JFK/UMass through several South Shore communities to Braintree.
- 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_69ad85aac4808190a092c9cc8911f584 |
completed | March 8, 2026, 2:20 p.m. |
| NER | Named-entity recognition | batch_69adb8e8ea848190b4ac167f1aba8ebd |
completed | March 8, 2026, 5:59 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69b34bd69f388190981da6454dfd4fb1 |
completed | March 12, 2026, 11:27 p.m. |
Created at: March 8, 2026, 3:14 p.m.