Triple
T11696960
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | MBTA Green Line A branch |
E278019
|
entity |
| Predicate | formerTerminus |
P388
|
FINISHED |
| Object | Watertown Yard |
E182350
|
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: Watertown Yard | Statement: [MBTA Green Line A branch, formerTerminus, Watertown Yard]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Watertown Yard Context triple: [MBTA Green Line A branch, formerTerminus, Watertown Yard]
-
A.
Watertown Yard
chosen
Watertown Yard is a Massachusetts Bay Transportation Authority bus facility and former streetcar yard in Watertown, Massachusetts, serving as a key layover and terminal point for several bus routes.
-
B.
Riverside Yard
Riverside Yard is a rail yard facility in Newton, Massachusetts, serving as a storage and maintenance area for trains on the MBTA Green Line’s D branch.
-
C.
Coney Island Yard
Coney Island Yard is one of the largest New York City Subway maintenance and storage facilities, serving multiple lines in Brooklyn.
-
D.
Arlington Depot
Arlington Depot is a historic railroad station in Arlington, Tennessee, preserved as a landmark reflecting the town’s early transportation and commercial history.
-
E.
Wellington Yard
Wellington Yard is a railway yard associated with Wellington station, used for storing, organizing, and managing trains and rolling stock.
- 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_69d6aafe02d881909900d54ad7d4af84 |
completed | April 8, 2026, 7:22 p.m. |
| NER | Named-entity recognition | batch_69d8a47cef60819088b7cc3a3a711e4c |
completed | April 10, 2026, 7:19 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69ef1471cba88190a7abdcbf4f579ea9 |
completed | April 27, 2026, 7:46 a.m. |
Created at: April 8, 2026, 9:40 p.m.