Triple
T800356
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Chicago Union Station |
E17115
|
entity |
| Predicate | isMajorHubFor |
P164
|
FINISHED |
| Object |
Amtrak Midwest services
Amtrak Midwest services are a network of state-supported intercity passenger rail routes connecting major cities across the Midwestern United States.
|
E95431
|
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: Amtrak Midwest services | Statement: [Chicago Union Station, isMajorHubFor, Amtrak Midwest services]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Amtrak Midwest services Context triple: [Chicago Union Station, isMajorHubFor, Amtrak Midwest services]
-
A.
Amtrak Wolverine service
Amtrak Wolverine service is a passenger rail line operated by Amtrak that runs between Chicago and Pontiac in Michigan, serving key cities across the state.
-
B.
Amtrak
Amtrak is the United States’ national passenger railroad service, operating intercity and long-distance trains across much of the country.
-
C.
Amtrak Lake Shore Limited
Amtrak Lake Shore Limited is a long-distance passenger train service that runs between Chicago and the Northeastern United States, primarily serving New York City and Boston.
-
D.
Amtrak Northeast Regional
Amtrak Northeast Regional is a passenger rail service that provides frequent intercity connections between major cities in the northeastern United States, including Boston, New York, Philadelphia, and Washington, D.C.
-
E.
Amtrak Ethan Allen Express
The Amtrak Ethan Allen Express is an intercity passenger train service that operates between New York City and Vermont, providing a key rail connection through the Hudson Valley and upstate New York.
- 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: Amtrak Midwest services Triple: [Chicago Union Station, isMajorHubFor, Amtrak Midwest services]
Generated description
Amtrak Midwest services are a network of state-supported intercity passenger rail routes connecting major cities across the Midwestern United States.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Amtrak Midwest services Target entity description: Amtrak Midwest services are a network of state-supported intercity passenger rail routes connecting major cities across the Midwestern United States.
-
A.
Amtrak Wolverine service
Amtrak Wolverine service is a passenger rail line operated by Amtrak that runs between Chicago and Pontiac in Michigan, serving key cities across the state.
-
B.
Amtrak
Amtrak is the United States’ national passenger railroad service, operating intercity and long-distance trains across much of the country.
-
C.
Amtrak Lake Shore Limited
Amtrak Lake Shore Limited is a long-distance passenger train service that runs between Chicago and the Northeastern United States, primarily serving New York City and Boston.
-
D.
Amtrak Northeast Regional
Amtrak Northeast Regional is a passenger rail service that provides frequent intercity connections between major cities in the northeastern United States, including Boston, New York, Philadelphia, and Washington, D.C.
-
E.
Amtrak Ethan Allen Express
The Amtrak Ethan Allen Express is an intercity passenger train service that operates between New York City and Vermont, providing a key rail connection through the Hudson Valley and upstate New York.
- 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_69a49378b9c48190adbf5f62e5b7aca1 |
completed | March 1, 2026, 7:28 p.m. |
| NER | Named-entity recognition | batch_69a4a7cb26dc8190bdd3a278b8695873 |
completed | March 1, 2026, 8:55 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69a68924e1048190ba60034c8b8b3b9e |
completed | March 3, 2026, 7:09 a.m. |
| NEDg | Description generation | batch_69a68a0f581c8190bdb2a9bda9bce1fa |
completed | March 3, 2026, 7:13 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69a6d6042aac8190ba0b092c4b3df66e |
completed | March 3, 2026, 12:37 p.m. |
Created at: March 1, 2026, 7:38 p.m.