Triple
T8407654
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Amtrak Silver Star |
E198539
|
entity |
| Predicate | locomotiveType |
P5426
|
FINISHED |
| Object | GE P42DC diesel locomotive |
E506923
|
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: GE P42DC diesel locomotive | Statement: [Amtrak Silver Star, locomotiveType, GE P42DC diesel locomotive]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: GE P42DC diesel locomotive Context triple: [Amtrak Silver Star, locomotiveType, GE P42DC diesel locomotive]
-
A.
GE P42DC locomotives
chosen
GE P42DC locomotives are diesel-electric passenger locomotives built by General Electric, widely used across North American intercity rail services for their reliability and high-speed capabilities.
-
B.
EMD GP9 locomotive
The EMD GP9 locomotive is a widely used four-axle diesel-electric road switcher built in the 1950s that became one of North America's most successful and versatile freight and passenger locomotives.
-
C.
EMD GP7 locomotive
The EMD GP7 locomotive is a widely used four-axle diesel-electric road switcher introduced in the late 1940s that helped usher in the transition from steam to diesel power on North American railroads.
-
D.
EMD SD40-2 locomotive
The EMD SD40-2 locomotive is a highly successful and widely used North American diesel-electric freight locomotive introduced in the 1970s, known for its reliability, modular design, and long service life.
-
E.
EMD GP40-2H
The EMD GP40-2H is a rebuilt, passenger-equipped variant of the EMD GP40-2 diesel-electric locomotive, featuring head-end power for commuter rail 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_69ca8310df9c8190b25f16161cca3e41 |
completed | March 30, 2026, 2:05 p.m. |
| NER | Named-entity recognition | batch_69cb831409308190981089c303ebaef4 |
completed | March 31, 2026, 8:17 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69ce030dccf08190a70c0abf0bdcf244 |
completed | April 2, 2026, 5:47 a.m. |
Created at: March 30, 2026, 6:05 p.m.