Triple
T2512791
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Metra Electric District line |
E52738
|
entity |
| Predicate | formerDowntownTerminal |
P36810
|
FINISHED |
| Object |
Randolph Street Terminal
Randolph Street Terminal was a former downtown Chicago commuter rail station that served as the central hub for trains on what is now Metra’s Electric District line.
|
E272747
|
NE FINISHED |
How this triple was built (5 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: Randolph Street Terminal | Statement: [Metra Electric District line, formerDowntownTerminal, Randolph Street Terminal]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Randolph Street Terminal Context triple: [Metra Electric District line, formerDowntownTerminal, Randolph Street Terminal]
-
A.
Evans Terminal
Evans Terminal is one of the passenger terminals at Detroit Metropolitan Wayne County Airport, serving as a major facility for airline operations and traveler services.
-
B.
St. George Terminal
St. George Terminal is the main Staten Island Ferry hub in St. George, Staten Island, connecting the borough to Lower Manhattan and serving as a key transit and commercial center.
-
C.
Hyde Street terminal
Hyde Street terminal is the northern endpoint of San Francisco’s historic Powell–Hyde cable car line, located near Fisherman’s Wharf and the city’s waterfront.
-
D.
Alexandria Union Station
Alexandria Union Station is a historic passenger rail station in Alexandria, Virginia, serving Amtrak and Virginia Railway Express trains near the Old Town area.
-
E.
King Street Station
King Street Station is a historic railway terminal in downtown Seattle, Washington, serving as a major hub for Amtrak and regional rail services.
- 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: Randolph Street Terminal Triple: [Metra Electric District line, formerDowntownTerminal, Randolph Street Terminal]
Generated description
Randolph Street Terminal was a former downtown Chicago commuter rail station that served as the central hub for trains on what is now Metra’s Electric District line.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Randolph Street Terminal Target entity description: Randolph Street Terminal was a former downtown Chicago commuter rail station that served as the central hub for trains on what is now Metra’s Electric District line.
-
A.
Evans Terminal
Evans Terminal is one of the passenger terminals at Detroit Metropolitan Wayne County Airport, serving as a major facility for airline operations and traveler services.
-
B.
St. George Terminal
St. George Terminal is the main Staten Island Ferry hub in St. George, Staten Island, connecting the borough to Lower Manhattan and serving as a key transit and commercial center.
-
C.
Hyde Street terminal
Hyde Street terminal is the northern endpoint of San Francisco’s historic Powell–Hyde cable car line, located near Fisherman’s Wharf and the city’s waterfront.
-
D.
Alexandria Union Station
Alexandria Union Station is a historic passenger rail station in Alexandria, Virginia, serving Amtrak and Virginia Railway Express trains near the Old Town area.
-
E.
King Street Station
King Street Station is a historic railway terminal in downtown Seattle, Washington, serving as a major hub for Amtrak and regional rail services.
- F. None of above. chosen
PD
Predicate disambiguation
gpt-5-mini-2025-08-07
Target predicate: formerDowntownTerminal Context triple: [Metra Electric District line, formerDowntownTerminal, Randolph Street Terminal]
-
A.
westTerminalStation
Indicates that a station serves as the western terminal (end point) of a route, line, or service.
-
B.
formerRailwayStation
Indicates that a location previously functioned as a railway station but is no longer in active railway service.
-
C.
originalRailroadTerminalReplaced
chosen
Indicates that one railroad terminal has been superseded or taken the place of another as the primary terminal.
-
D.
isDowntownEndpointOf
Indicates that a location serves as the downtown terminus or endpoint of a route, line, or path.
-
E.
terminalStationSouth
Indicates that a given station serves as the southern terminal (end point) of a particular route or line.
- F. None of above.
Provenance (6 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_69ab4958e76481908a235377dd921c9e |
completed | March 6, 2026, 9:38 p.m. |
| NER | Named-entity recognition | batch_69abd5a33234819082ad49fa6594b6be |
completed | March 7, 2026, 7:37 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69af1faed61481909f13b8a014b39ed3 |
completed | March 9, 2026, 7:29 p.m. |
| NEDg | Description generation | batch_69af20e421308190b62a954659537163 |
completed | March 9, 2026, 7:35 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69af215e2eec8190a18e41824acf196b |
completed | March 9, 2026, 7:37 p.m. |
| PD | Predicate disambiguation | batch_69abd0bf37c0819088d28b5081ba7556 |
completed | March 7, 2026, 7:16 a.m. |
Created at: March 6, 2026, 9:46 p.m.