Triple
T4601380
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | CTA 3200-series railcars |
E100325
|
entity |
| Predicate | usedOnLine |
P15252
|
FINISHED |
| Object |
Red Line
The Red Line is a major rapid transit route in Chicago's 'L' system, running north–south through the city and operated by the Chicago Transit Authority.
|
E15830
|
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: Red Line | Statement: [CTA 3200-series railcars, usedOnLine, Red Line]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Red Line Context triple: [CTA 3200-series railcars, usedOnLine, Red Line]
-
A.
Red Line
The Red Line is a primary route of the MetroLink light rail system serving key destinations in the St. Louis metropolitan area.
-
B.
Red Line
The Red Line is one of the primary heavy-rail rapid transit routes in Atlanta’s MARTA system, running north–south and serving key destinations across the metropolitan area.
-
C.
Red Line
Red Line was the original name of Los Angeles Metro’s B Line, a heavy-rail subway corridor serving key neighborhoods between Downtown Los Angeles and North Hollywood.
-
D.
Red Line
Red Line is one of the main rapid transit routes of the Dubai Metro, running along key areas of the city and serving many of its major commercial and residential districts.
-
E.
Red Line
The Red Line is one of the major corridors of the Delhi Metro rapid transit system, serving numerous densely populated areas in and around Delhi.
- 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: Red Line Triple: [CTA 3200-series railcars, usedOnLine, Red Line]
Generated description
The Red Line is a major rapid transit route in Chicago's 'L' system, running north–south through the city and operated by the Chicago Transit Authority.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Red Line Target entity description: The Red Line is a major rapid transit route in Chicago's 'L' system, running north–south through the city and operated by the Chicago Transit Authority.
-
A.
Red Line
chosen
The Red Line is a major rapid transit route in Chicago that runs north–south through the city, serving as one of the busiest lines in its subway and elevated rail system.
-
B.
Red Line
The Red Line is a major rapid transit route in the Boston metropolitan area, operated by the MBTA and running primarily north–south through key neighborhoods and suburbs.
-
C.
Red Line
Red Line is a major rapid transit route in the Washington Metro system, running through key areas of Washington, D.C., and its Maryland suburbs.
-
D.
Red Line
The Red Line is one of the primary heavy-rail rapid transit routes in Atlanta’s MARTA system, running north–south and serving key destinations across the metropolitan area.
-
E.
Red Line
The Red Line is a major light rail route in the Dallas Area Rapid Transit (DART) system serving key corridors across the Dallas–Fort Worth metro area.
- F. None of above.
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_69bd43cbc014819098b45f435908f88a |
completed | March 20, 2026, 12:55 p.m. |
| NER | Named-entity recognition | batch_69bd597346a08190b47eda3b73076f8b |
completed | March 20, 2026, 2:28 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69be101759e08190b3190c6e8961b3f7 |
completed | March 21, 2026, 3:27 a.m. |
| NEDg | Description generation | batch_69be10cce8d0819093c9f1c721142e48 |
completed | March 21, 2026, 3:30 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69be119987bc8190b0b0f75a2c07a60c |
completed | March 21, 2026, 3:33 a.m. |
Created at: March 20, 2026, 1:11 p.m.