Triple
T781551
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | MBTA Green Line D branch |
E16506
|
entity |
| Predicate | convertedFrom |
P5574
|
FINISHED |
| Object | Boston and Albany Railroad Highland branch |
E37184
|
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: Boston and Albany Railroad Highland branch | Statement: [MBTA Green Line D branch, convertedFrom, Boston and Albany Railroad Highland branch]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Boston and Albany Railroad Highland branch Context triple: [MBTA Green Line D branch, convertedFrom, Boston and Albany Railroad Highland branch]
-
A.
Boston and Albany Railroad Highland branch
chosen
The Boston and Albany Railroad Highland branch was a former suburban rail line in the Boston area that later became the right-of-way for the MBTA Green Line D branch light rail service.
-
B.
Fitchburg Railroad
The Fitchburg Railroad was a historic New England rail line that operated across Massachusetts and into Vermont, later becoming part of the Boston and Maine Railroad system.
-
C.
Boston and Lowell Railroad
The Boston and Lowell Railroad was a 19th-century New England railway company that operated a key line between Boston and Lowell, Massachusetts, and later became part of larger regional rail systems.
-
D.
Boston–Concord main line
The Boston–Concord main line was a principal intercity rail corridor in New England that connected Boston, Massachusetts with Concord, New Hampshire, serving as a key route for the Boston and Maine Railroad.
-
E.
Concord Railroad
Concord Railroad was a 19th-century New Hampshire railroad company that later became part of the Boston and Maine Railroad through consolidation.
- 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_69a4936ad1fc81908f190208059ccf78 |
completed | March 1, 2026, 7:28 p.m. |
| NER | Named-entity recognition | batch_69a4a751ea3481908a622d5255249883 |
completed | March 1, 2026, 8:53 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69a66d9f13308190b2fccca575e03ec1 |
completed | March 3, 2026, 5:11 a.m. |
Created at: March 1, 2026, 7:37 p.m.