Triple
T800353
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Chicago Union Station |
E17115
|
entity |
| Predicate | connectsTo |
P845
|
FINISHED |
| Object |
North Central Service line
The North Central Service line is a Metra commuter rail route in the Chicago metropolitan area that runs between downtown Chicago and northern suburbs near Antioch, Illinois.
|
E95430
|
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: North Central Service line | Statement: [Chicago Union Station, connectsTo, North Central Service line]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: North Central Service line Context triple: [Chicago Union Station, connectsTo, North Central Service line]
-
A.
SouthWest Service line
The SouthWest Service line is a Metra commuter rail route in the Chicago metropolitan area that provides passenger service between downtown Chicago and southwestern suburbs.
-
B.
Northern Central Railway
Northern Central Railway was a historic American railroad that operated primarily in Pennsylvania and Maryland, serving as an important north–south link in the 19th and early 20th centuries.
-
C.
Trenton Line
Trenton Line is a commuter rail service in the Philadelphia region operated by SEPTA Regional Rail, connecting Center City Philadelphia with Trenton, New Jersey.
-
D.
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.
-
E.
CSX RF&P Subdivision
The CSX RF&P Subdivision is a major CSX Transportation rail line in Virginia that forms part of the busy freight and passenger corridor linking Washington, D.C. with Richmond and points south.
- 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: North Central Service line Triple: [Chicago Union Station, connectsTo, North Central Service line]
Generated description
The North Central Service line is a Metra commuter rail route in the Chicago metropolitan area that runs between downtown Chicago and northern suburbs near Antioch, Illinois.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: North Central Service line Target entity description: The North Central Service line is a Metra commuter rail route in the Chicago metropolitan area that runs between downtown Chicago and northern suburbs near Antioch, Illinois.
-
A.
SouthWest Service line
The SouthWest Service line is a Metra commuter rail route in the Chicago metropolitan area that provides passenger service between downtown Chicago and southwestern suburbs.
-
B.
Northern Central Railway
Northern Central Railway was a historic American railroad that operated primarily in Pennsylvania and Maryland, serving as an important north–south link in the 19th and early 20th centuries.
-
C.
Trenton Line
Trenton Line is a commuter rail service in the Philadelphia region operated by SEPTA Regional Rail, connecting Center City Philadelphia with Trenton, New Jersey.
-
D.
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.
-
E.
CSX RF&P Subdivision
The CSX RF&P Subdivision is a major CSX Transportation rail line in Virginia that forms part of the busy freight and passenger corridor linking Washington, D.C. with Richmond and points south.
- 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.