Triple
T14890193
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | MBTA Silver Line at South Station |
E359734
|
entity |
| Predicate | connectsUndergroundTo |
P41500
|
FINISHED |
| Object | South Station headhouse |
E18279
|
NE FINISHED |
How this triple was built (3 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: South Station headhouse | Statement: [MBTA Silver Line at South Station, connectsUndergroundTo, South Station headhouse]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: South Station headhouse Context triple: [MBTA Silver Line at South Station, connectsUndergroundTo, South Station headhouse]
-
A.
South Station
chosen
South Station is Boston’s major intercity rail and bus terminal and a key MBTA subway hub in the city’s downtown.
-
B.
Roxbury Railroad Station
Roxbury Railroad Station is a historic former train station in Roxbury, New York, recognized for its significance in the region’s railroad and transportation history.
-
C.
Lowell station
Lowell station is a passenger rail station in Lowell, Massachusetts that serves as the northern terminus of the MBTA Commuter Rail’s Lowell Line.
-
D.
MBTA North Station
MBTA North Station is a major Boston transportation hub that serves as a key terminal for MBTA subway and commuter rail lines as well as Amtrak services.
-
E.
Boylston station
Boylston station is a historic underground light rail stop in downtown Boston that serves the MBTA Green Line.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
PD
Predicate disambiguation
gpt-5-mini-2025-08-07
Target predicate: connectsUndergroundTo Context triple: [MBTA Silver Line at South Station, connectsUndergroundTo, South Station headhouse]
-
A.
hasUndergroundConnections
chosen
Indicates that one entity is linked to another through subterranean or hidden passageways, networks, or channels.
-
B.
subwayLine
Indicates that there is a subway line connection or service relationship between the referenced entities.
-
C.
subwayStation
Indicates that one entity is a subway station associated with, located in, or serving the other entity.
-
D.
operatedUnderground
Indicates that an entity conducted its activities or operations beneath the surface of the ground, rather than at or above ground level.
-
E.
nearUndergroundLine
Indicates that one entity is located close in distance to an underground (subway/metro) line.
- F. None of above.
Provenance (4 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_69d827980cbc8190a0c569ae3940a1d9 |
completed | April 9, 2026, 10:26 p.m. |
| NER | Named-entity recognition | batch_69ded5f6cf5c8190b6b28f58fafe5d59 |
completed | April 15, 2026, 12:04 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69fe72b11584819084f32516cb0023a1 |
completed | May 8, 2026, 11:33 p.m. |
| PD | Predicate disambiguation | batch_69de8c1a2bcc81908f914e2e2ced65eb |
completed | April 14, 2026, 6:48 p.m. |
Created at: April 10, 2026, 2:09 a.m.