Triple
T850778
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | MBTA Green Line E branch |
E18379
|
entity |
| Predicate | undergroundSectionLocation |
P15152
|
FINISHED |
| Object | downtown Boston |
E95364
|
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: downtown Boston | Statement: [MBTA Green Line E branch, undergroundSectionLocation, downtown Boston]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: downtown Boston Context triple: [MBTA Green Line E branch, undergroundSectionLocation, downtown Boston]
-
A.
Downtown Boston
chosen
Downtown Boston is the city’s historic and commercial core, known for its dense cluster of landmarks, offices, and shopping areas.
-
B.
Boston town centre
Boston town centre is the historic commercial and civic heart of Boston, Lincolnshire, featuring traditional markets, shops, and notable heritage buildings.
-
C.
North End, Boston
North End, Boston is the city's oldest residential neighborhood, famed for its historic sites like the Paul Revere House and its vibrant Italian-American culture, restaurants, and festivals.
-
D.
Boston Common
Boston Common is a historic central public park in downtown Boston and the oldest city park in the United States.
-
E.
Downtown Crossing
Downtown Crossing is a major subway station and commercial hub in downtown Boston, Massachusetts, known for its heavy foot traffic and connections between multiple MBTA lines.
- 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: undergroundSectionLocation Context triple: [MBTA Green Line E branch, undergroundSectionLocation, downtown Boston]
-
A.
hasUndergroundSection
chosen
Indicates that an entity includes a portion or segment that is located below ground level.
-
B.
locatedUnder
Indicates that one entity is positioned directly or generally beneath another entity in space.
-
C.
hasUndergroundSlide
Indicates that one entity features or includes an underground slide connecting it to another location or structure.
-
D.
centralLocation
Indicates that one entity serves as the primary or central place associated with another entity.
-
E.
portalLocation
Indicates that a portal is situated at or associated with a specific location.
- 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_69a4938b04208190b82e1df6b572c548 |
completed | March 1, 2026, 7:29 p.m. |
| NER | Named-entity recognition | batch_69a4ac215194819099e6bc1b5df58fb3 |
completed | March 1, 2026, 9:14 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69a93398a6948190981e932178aee6b9 |
completed | March 5, 2026, 7:41 a.m. |
| PD | Predicate disambiguation | batch_69a4aa81ef348190b067f817574e9efe |
completed | March 1, 2026, 9:07 p.m. |
Created at: March 1, 2026, 7:38 p.m.