Triple
T3779555
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Symphony station |
E83387
|
entity |
| Predicate | servedBy |
P82
|
FINISHED |
| Object | E branch of the MBTA Green Line |
E205394
|
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: E branch of the MBTA Green Line | Statement: [Symphony station, servedBy, E branch of the MBTA Green Line]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: E branch of the MBTA Green Line Context triple: [Symphony station, servedBy, E branch of the MBTA Green Line]
-
A.
Green Line E branch streetcar (surface portion)
The Green Line E branch streetcar (surface portion) is the above-ground segment of Boston’s MBTA Green Line E branch that historically ran along Huntington Avenue and surrounding streets, serving local neighborhoods with light rail service.
-
B.
Green Line E branch
chosen
The Green Line E branch is a light rail service of Boston's MBTA Green Line that runs from downtown through the Back Bay and Longwood Medical Area to Heath Street in Jamaica Plain.
-
C.
Green Line (MBTA)
The Green Line (MBTA) is Boston’s light rail/streetcar line, serving key neighborhoods and institutions from downtown through areas like Allston, Brookline, and the Longwood Medical Area.
-
D.
Green Line B branch
The Green Line B branch is a light rail service of Boston's MBTA Green Line that runs along Commonwealth Avenue, primarily serving Boston University and the Allston–Brighton neighborhoods.
-
E.
Watertown branch of the Green Line A
The Watertown branch of the Green Line A was a former Boston streetcar line that once ran between downtown and Watertown before being permanently converted to bus service.
- 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_69ad8b235e608190b5a2b1d1bfcef50b |
completed | March 8, 2026, 2:43 p.m. |
| NER | Named-entity recognition | batch_69adcc7948848190adc96b0513bd5c97 |
completed | March 8, 2026, 7:22 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69b4f040676c8190aa3a7952a9d6f62b |
completed | March 14, 2026, 5:21 a.m. |
Created at: March 8, 2026, 3:36 p.m.