Triple
T1663456
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Alewife station |
E35959
|
entity |
| Predicate | ownedBy |
P347
|
FINISHED |
| Object | Massachusetts Bay Transportation Authority |
E2866
|
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: Massachusetts Bay Transportation Authority | Statement: [Alewife station, ownedBy, Massachusetts Bay Transportation Authority]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Massachusetts Bay Transportation Authority Context triple: [Alewife station, ownedBy, Massachusetts Bay Transportation Authority]
-
A.
MBTA
chosen
The MBTA (Massachusetts Bay Transportation Authority) is the public transit agency that operates subway, bus, commuter rail, and ferry services in the Greater Boston area.
-
B.
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.
-
C.
Lowell Regional Transit Authority
The Lowell Regional Transit Authority is a public transportation agency that operates bus and paratransit services in Lowell, Massachusetts and surrounding communities.
-
D.
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.
-
E.
MassDOT Rail and Transit Division
The MassDOT Rail and Transit Division is the branch of Massachusetts’ state transportation agency responsible for planning, funding, and overseeing passenger rail and public transit services across the Commonwealth.
- 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_69a88606aa808190aa0b421b4271f220 |
completed | March 4, 2026, 7:20 p.m. |
| NER | Named-entity recognition | batch_69a90ab5d1a08190a3325ff203b573fb |
completed | March 5, 2026, 4:46 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69ae02fafaac81908da419946e5a279d |
completed | March 8, 2026, 11:15 p.m. |
Created at: March 4, 2026, 7:29 p.m.