Triple
T1293124
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Minuteman Bikeway |
E27591
|
entity |
| Predicate | railTrailConversionOf |
P2515
|
FINISHED |
| Object |
Boston and Maine Railroad Lexington Branch
The Boston and Maine Railroad Lexington Branch was a former suburban rail line in Massachusetts that once connected communities northwest of Boston and later provided the corridor for today’s Minuteman Bikeway.
|
E147295
|
NE FINISHED |
How this triple was built (5 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 Maine Railroad Lexington Branch | Statement: [Minuteman Bikeway, railTrailConversionOf, Boston and Maine Railroad Lexington Branch]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Boston and Maine Railroad Lexington Branch Context triple: [Minuteman Bikeway, railTrailConversionOf, Boston and Maine Railroad Lexington Branch]
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
Boston and Albany Railroad Highland branch
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.
-
E.
Eastern Railroad (of Massachusetts)
Eastern Railroad (of Massachusetts) was a 19th-century New England railroad company that operated routes north of Boston and later became part of the Boston and Maine Railroad system.
- 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: Boston and Maine Railroad Lexington Branch Triple: [Minuteman Bikeway, railTrailConversionOf, Boston and Maine Railroad Lexington Branch]
Generated description
The Boston and Maine Railroad Lexington Branch was a former suburban rail line in Massachusetts that once connected communities northwest of Boston and later provided the corridor for today’s Minuteman Bikeway.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Boston and Maine Railroad Lexington Branch Target entity description: The Boston and Maine Railroad Lexington Branch was a former suburban rail line in Massachusetts that once connected communities northwest of Boston and later provided the corridor for today’s Minuteman Bikeway.
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
Boston and Albany Railroad Highland branch
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.
-
E.
Eastern Railroad (of Massachusetts)
Eastern Railroad (of Massachusetts) was a 19th-century New England railroad company that operated routes north of Boston and later became part of the Boston and Maine Railroad system.
- F. None of above. chosen
PD
Predicate disambiguation
gpt-5-mini-2025-08-07
Target predicate: railTrailConversionOf Context triple: [Minuteman Bikeway, railTrailConversionOf, Boston and Maine Railroad Lexington Branch]
-
A.
hasRailTrail
chosen
Indicates that one location or entity possesses, includes, or is connected by a rail trail (a recreational trail converted from or running along a former or existing railway corridor) to another location or entity.
-
B.
trailName
Indicates the name assigned to a specific trail or path in the relationship.
-
C.
railTracks
Indicates that one entity consists of, includes, or is associated with rail tracks used for guiding trains or rail vehicles.
-
D.
railroad
Indicates that one entity constructs, operates, or provides railroad or train transportation services for another entity or area.
-
E.
usesRailInfrastructureOf
Indicates that one entity operates on, accesses, or otherwise makes use of the rail infrastructure owned or managed by another entity.
- F. None of above.
Provenance (6 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_69a496d4ec448190ad653b2590c46711 |
completed | March 1, 2026, 7:43 p.m. |
| NER | Named-entity recognition | batch_69a4c3bb3a9c81909db2ad91defd87b6 |
completed | March 1, 2026, 10:54 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69acacc1e7948190a1ecd240c751d258 |
completed | March 7, 2026, 10:54 p.m. |
| NEDg | Description generation | batch_69acad6df8f08190bea3b43f15ef3a09 |
completed | March 7, 2026, 10:57 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69acadd171b08190a5454e75babd39a3 |
completed | March 7, 2026, 10:59 p.m. |
| PD | Predicate disambiguation | batch_69a4bee64d908190b6a9bb479959d523 |
completed | March 1, 2026, 10:34 p.m. |
Created at: March 1, 2026, 7:51 p.m.