Triple
T4235520
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Altamont Corridor Express |
E94682
|
entity |
| Predicate | usesRailLine |
P848
|
FINISHED |
| Object |
Union Pacific Railroad Coast Subdivision
The Union Pacific Railroad Coast Subdivision is a key rail corridor in California that carries both freight and commuter services, including trains operated by the Altamont Corridor Express.
|
E428219
|
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: Union Pacific Railroad Coast Subdivision | Statement: [Altamont Corridor Express, usesRailLine, Union Pacific Railroad Coast Subdivision]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Union Pacific Railroad Coast Subdivision Context triple: [Altamont Corridor Express, usesRailLine, Union Pacific Railroad Coast Subdivision]
-
A.
Union Pacific Railroad Niles Subdivision
The Union Pacific Railroad Niles Subdivision is a freight and passenger rail corridor in California’s East Bay and Tri-Valley region that carries both Union Pacific trains and commuter services such as the Altamont Corridor Express.
-
B.
Union Pacific West Line
The Union Pacific West Line is a commuter rail route in the Chicago metropolitan area that runs between downtown Chicago and western suburbs, providing daily passenger service as part of the Metra system.
-
C.
Union Pacific North Line
The Union Pacific North Line is a Metra commuter rail line in the Chicago metropolitan area that runs north from downtown Chicago through suburbs along Lake Michigan into Kenosha, Wisconsin.
-
D.
Union Pacific Railroad Oakland Subdivision
The Union Pacific Railroad Oakland Subdivision is a key freight and passenger rail corridor in Northern California that connects the East Bay with the Central Valley and is used by services such as the Altamont Corridor Express.
-
E.
Union Pacific Northwest Line
The Union Pacific Northwest Line is a commuter rail route serving Chicago and its northwestern suburbs as part of the Metra rail 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: Union Pacific Railroad Coast Subdivision Triple: [Altamont Corridor Express, usesRailLine, Union Pacific Railroad Coast Subdivision]
Generated description
The Union Pacific Railroad Coast Subdivision is a key rail corridor in California that carries both freight and commuter services, including trains operated by the Altamont Corridor Express.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Union Pacific Railroad Coast Subdivision Target entity description: The Union Pacific Railroad Coast Subdivision is a key rail corridor in California that carries both freight and commuter services, including trains operated by the Altamont Corridor Express.
-
A.
Union Pacific Railroad Niles Subdivision
The Union Pacific Railroad Niles Subdivision is a freight and passenger rail corridor in California’s East Bay and Tri-Valley region that carries both Union Pacific trains and commuter services such as the Altamont Corridor Express.
-
B.
Union Pacific West Line
The Union Pacific West Line is a commuter rail route in the Chicago metropolitan area that runs between downtown Chicago and western suburbs, providing daily passenger service as part of the Metra system.
-
C.
Union Pacific North Line
The Union Pacific North Line is a Metra commuter rail line in the Chicago metropolitan area that runs north from downtown Chicago through suburbs along Lake Michigan into Kenosha, Wisconsin.
-
D.
Union Pacific Railroad Oakland Subdivision
The Union Pacific Railroad Oakland Subdivision is a key freight and passenger rail corridor in Northern California that connects the East Bay with the Central Valley and is used by services such as the Altamont Corridor Express.
-
E.
Union Pacific Northwest Line
The Union Pacific Northwest Line is a commuter rail route serving Chicago and its northwestern suburbs as part of the Metra rail system.
- 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_69b34537cc6481909cd0a96acbb33ef7 |
completed | March 12, 2026, 10:59 p.m. |
| NER | Named-entity recognition | batch_69b34e72ff588190a50c04ab975612dd |
completed | March 12, 2026, 11:38 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69b5c710c2f081908b9be1da2bdf1b43 |
completed | March 14, 2026, 8:37 p.m. |
| NEDg | Description generation | batch_69b5c79491a48190865aaa674baebd9b |
completed | March 14, 2026, 8:39 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69b5c80ecc7481908deb061969a82c59 |
completed | March 14, 2026, 8:41 p.m. |
Created at: March 12, 2026, 11:05 p.m.