Triple
T269483
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | MBTA Green Line D branch |
E5598
|
entity |
| Predicate | hasStation |
P35
|
FINISHED |
| Object |
Boylston station
Boylston station is a historic underground light rail stop in downtown Boston that serves the MBTA Green Line.
|
E52583
|
NE FINISHED |
How this triple was built (4 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: Boylston station | Statement: [MBTA Green Line D branch, hasStation, Boylston station]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Boylston station Context triple: [MBTA Green Line D branch, hasStation, Boylston station]
-
A.
Quincy Center station
Quincy Center station is a major MBTA Red Line rapid transit and commuter rail hub located in downtown Quincy, Massachusetts.
-
B.
Wellington Station (MBTA)
Wellington Station (MBTA) is an Orange Line rapid transit station in Medford, Massachusetts, serving as a key park-and-ride and bus transfer hub just north of downtown Boston.
-
C.
MBTA Silver Hill station
MBTA Silver Hill station is a small commuter rail stop on the Massachusetts Bay Transportation Authority’s Fitchburg Line serving the Silver Hill neighborhood of Weston, Massachusetts.
-
D.
South Station
South Station is Boston’s major intercity rail and bus terminal and a key MBTA subway hub in the city’s downtown.
-
E.
Ruggles station
Ruggles station is a major multimodal transit hub in Boston, Massachusetts, serving MBTA Orange Line trains, multiple commuter rail lines, and numerous bus routes.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg
Description generation
gpt-5.1
Instruction
Generate a one-sentence description of the target entity. You are given a context triple in the form (subject, predicate, object), where the object is the target entity. # Instructions Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. Avoid repeating the information from the triple, unless really essential. # Response Format Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Boylston station Triple: [MBTA Green Line D branch, hasStation, Boylston station]
Generated description
Boylston station is a historic underground light rail stop in downtown Boston that serves the MBTA Green Line.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Boylston station Target entity description: Boylston station is a historic underground light rail stop in downtown Boston that serves the MBTA Green Line.
-
A.
Quincy Center station
Quincy Center station is a major MBTA Red Line rapid transit and commuter rail hub located in downtown Quincy, Massachusetts.
-
B.
Wellington Station (MBTA)
Wellington Station (MBTA) is an Orange Line rapid transit station in Medford, Massachusetts, serving as a key park-and-ride and bus transfer hub just north of downtown Boston.
-
C.
MBTA Silver Hill station
MBTA Silver Hill station is a small commuter rail stop on the Massachusetts Bay Transportation Authority’s Fitchburg Line serving the Silver Hill neighborhood of Weston, Massachusetts.
-
D.
South Station
South Station is Boston’s major intercity rail and bus terminal and a key MBTA subway hub in the city’s downtown.
-
E.
Ruggles station
Ruggles station is a major multimodal transit hub in Boston, Massachusetts, serving MBTA Orange Line trains, multiple commuter rail lines, and numerous bus routes.
- F. None of above. chosen
Provenance (5 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_69a25853594c8190b05ec3a586ec88bf |
completed | Feb. 28, 2026, 2:52 a.m. |
| NER | Named-entity recognition | batch_69a25db00ed48190be6f598807265356 |
completed | Feb. 28, 2026, 3:14 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69a4239b5dfc8190930c379823e42139 |
completed | March 1, 2026, 11:31 a.m. |
| NEDg | Description generation | batch_69a423c8b41081909d04808907fe795d |
completed | March 1, 2026, 11:32 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69a4242e9f4481908959af2d45f43234 |
completed | March 1, 2026, 11:34 a.m. |
Created at: Feb. 28, 2026, 2:57 a.m.