Triple
T17927808
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | MBTA Fairmount Line |
E448241
|
entity |
| Predicate | alsoKnownAs |
P39
|
FINISHED |
| Object |
Indigo Line (proposed branding)
Indigo Line (proposed branding) is a proposed rapid-transit-style identity for Boston’s MBTA Fairmount commuter rail corridor, envisioned to provide more frequent, subway-like service to the neighborhoods it serves.
|
E1296946
|
NE FINISHED |
How this triple was built (4 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: Indigo Line (proposed branding) | Statement: [MBTA Fairmount Line, alsoKnownAs, Indigo Line (proposed branding)]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Indigo Line (proposed branding) Context triple: [MBTA Fairmount Line, alsoKnownAs, Indigo Line (proposed branding)]
-
A.
MARC Penn Line
The MARC Penn Line is a Maryland commuter rail service that runs along the Amtrak Northeast Corridor between Washington, D.C., and Perryville, serving numerous communities in Prince George’s County and beyond.
-
B.
Purple Line
The Purple Line is a rapid transit route in Chicago's 'L' system that primarily serves the city's northern suburbs and connects them to the North Side of Chicago.
-
C.
Purple Line
The Purple Line is a light rail route in Houston, Texas, that serves as part of the METRORail system, connecting downtown with southeastern neighborhoods and key destinations.
-
D.
Purple Line
The Purple Line is one of the urban cable car routes in La Paz–El Alto’s Mi Teleférico network, known for its distinctive purple branding and role in the city’s aerial public transit system.
-
E.
Purple Line
The Purple Line is a rapid transit line that forms part of the Baku Metro system in Baku, Azerbaijan.
- 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: Indigo Line (proposed branding) Triple: [MBTA Fairmount Line, alsoKnownAs, Indigo Line (proposed branding)]
Generated description
Indigo Line (proposed branding) is a proposed rapid-transit-style identity for Boston’s MBTA Fairmount commuter rail corridor, envisioned to provide more frequent, subway-like service to the neighborhoods it serves.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Indigo Line (proposed branding) Target entity description: Indigo Line (proposed branding) is a proposed rapid-transit-style identity for Boston’s MBTA Fairmount commuter rail corridor, envisioned to provide more frequent, subway-like service to the neighborhoods it serves.
-
A.
MARC Penn Line
The MARC Penn Line is a Maryland commuter rail service that runs along the Amtrak Northeast Corridor between Washington, D.C., and Perryville, serving numerous communities in Prince George’s County and beyond.
-
B.
Purple Line
The Purple Line is a rapid transit route in Chicago's 'L' system that primarily serves the city's northern suburbs and connects them to the North Side of Chicago.
-
C.
Purple Line
The Purple Line is a light rail route in Houston, Texas, that serves as part of the METRORail system, connecting downtown with southeastern neighborhoods and key destinations.
-
D.
Purple Line
The Purple Line is one of the urban cable car routes in La Paz–El Alto’s Mi Teleférico network, known for its distinctive purple branding and role in the city’s aerial public transit system.
-
E.
Purple Line
The Purple Line is a rapid transit line that forms part of the Baku Metro system in Baku, Azerbaijan.
- F. None of above. chosen
Provenance (5 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_69d8b9f79d14819095540856928f0e25 |
completed | April 10, 2026, 8:51 a.m. |
| NER | Named-entity recognition | batch_69e4a5505af88190aa7a5cfee0baa3a4 |
completed | April 19, 2026, 9:50 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_6a032136546c81909556406f96f8c04b |
completed | May 12, 2026, 12:46 p.m. |
| NEDg | Description generation | batch_6a032282ce908190a484708ec9995d60 |
completed | May 12, 2026, 12:52 p.m. |
| NED2 | Entity disambiguation (via description) | batch_6a032466070c819084e17d0bf5612844 |
completed | May 12, 2026, 1 p.m. |
Created at: April 10, 2026, 10:20 a.m.