Triple
T4178939
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | MBTA diesel locomotives |
E86545
|
entity |
| Predicate | hasModel |
P2390
|
FINISHED |
| Object |
F40PH-2D (rebuilt variants, historically)
The F40PH-2D rebuilt variants are upgraded versions of the classic EMD F40PH diesel-electric passenger locomotives, historically used by the MBTA for commuter rail service around Boston.
|
E419694
|
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: F40PH-2D (rebuilt variants, historically) | Statement: [MBTA diesel locomotives, hasModel, F40PH-2D (rebuilt variants, historically)]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: F40PH-2D (rebuilt variants, historically) Context triple: [MBTA diesel locomotives, hasModel, F40PH-2D (rebuilt variants, historically)]
-
A.
GP40PH-2
The GP40PH-2 is a rebuilt passenger diesel-electric locomotive, derived from the EMD GP40 freight design and equipped with head-end power for commuter rail service.
-
B.
F24
F24 was the pennant number of HMS Maori, a British Tribal-class destroyer that served with distinction in the Royal Navy during World War II.
-
C.
J-4
J-4 is the logistics directorate within a joint military staff responsible for planning, coordinating, and overseeing logistics and sustainment operations.
-
D.
F-2
F-2 is a three-quarter-ton model in Ford’s first-generation postwar F-Series pickup truck lineup, positioned between the lighter F-1 and heavier F-3 trucks.
-
E.
J40
The J40 is a classic generation of the Toyota Land Cruiser renowned for its rugged off-road capability and iconic, boxy design.
- 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: F40PH-2D (rebuilt variants, historically) Triple: [MBTA diesel locomotives, hasModel, F40PH-2D (rebuilt variants, historically)]
Generated description
The F40PH-2D rebuilt variants are upgraded versions of the classic EMD F40PH diesel-electric passenger locomotives, historically used by the MBTA for commuter rail service around Boston.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: F40PH-2D (rebuilt variants, historically) Target entity description: The F40PH-2D rebuilt variants are upgraded versions of the classic EMD F40PH diesel-electric passenger locomotives, historically used by the MBTA for commuter rail service around Boston.
-
A.
GP40PH-2
The GP40PH-2 is a rebuilt passenger diesel-electric locomotive, derived from the EMD GP40 freight design and equipped with head-end power for commuter rail service.
-
B.
F24
F24 was the pennant number of HMS Maori, a British Tribal-class destroyer that served with distinction in the Royal Navy during World War II.
-
C.
J-4
J-4 is the logistics directorate within a joint military staff responsible for planning, coordinating, and overseeing logistics and sustainment operations.
-
D.
F-2
F-2 is a three-quarter-ton model in Ford’s first-generation postwar F-Series pickup truck lineup, positioned between the lighter F-1 and heavier F-3 trucks.
-
E.
J40
The J40 is a classic generation of the Toyota Land Cruiser renowned for its rugged off-road capability and iconic, boxy design.
- 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_69aed93de98c8190ad838ce507b77c8a |
completed | March 9, 2026, 2:29 p.m. |
| NER | Named-entity recognition | batch_69af030114c88190b725908a32ace750 |
completed | March 9, 2026, 5:27 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69b589f5864881909c9fc787dd9b2341 |
completed | March 14, 2026, 4:16 p.m. |
| NEDg | Description generation | batch_69b58a81af5481908ad8fe2c7925cb99 |
completed | March 14, 2026, 4:19 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69b58b6ee40c8190a3e93f03a66df1b2 |
completed | March 14, 2026, 4:23 p.m. |
Created at: March 9, 2026, 3:45 p.m.