Triple
T191896
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Chicago Rapid Transit Company |
E3738
|
entity |
| Predicate | precededBy |
P97
|
FINISHED |
| Object |
Northwestern Elevated Railroad
The Northwestern Elevated Railroad was an early elevated rapid transit line in Chicago that later became part of the city’s unified "L" system.
|
E49697
|
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: Northwestern Elevated Railroad | Statement: [Chicago Rapid Transit Company, precededBy, Northwestern Elevated Railroad]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Northwestern Elevated Railroad Context triple: [Chicago Rapid Transit Company, precededBy, Northwestern Elevated Railroad]
-
A.
Metropolitan West Side Elevated Railroad
The Metropolitan West Side Elevated Railroad was an early elevated transit line in Chicago that formed part of the city’s first rapid transit system on the West Side.
-
B.
Calumet and South Chicago Railway Company
The Calumet and South Chicago Railway Company was a street railway operator that provided transit services in Chicago’s South Side and surrounding industrial areas in the early 20th century.
-
C.
Chicago "L"
The Chicago "L" is the elevated rapid transit system serving Chicago and some surrounding suburbs, known for its iconic above-ground tracks and extensive urban rail network.
-
D.
Chicago Surface Lines
Chicago Surface Lines was a privately operated streetcar and bus system that provided most of Chicago’s surface public transportation in the first half of the 20th century.
-
E.
Chicago Rapid Transit Company
The Chicago Rapid Transit Company was the private operator of Chicago’s elevated “L” rail system in the early 20th century before public transit was consolidated under the Chicago Transit Authority.
- 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: Northwestern Elevated Railroad Triple: [Chicago Rapid Transit Company, precededBy, Northwestern Elevated Railroad]
Generated description
The Northwestern Elevated Railroad was an early elevated rapid transit line in Chicago that later became part of the city’s unified "L" system.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Northwestern Elevated Railroad Target entity description: The Northwestern Elevated Railroad was an early elevated rapid transit line in Chicago that later became part of the city’s unified "L" system.
-
A.
Metropolitan West Side Elevated Railroad
The Metropolitan West Side Elevated Railroad was an early elevated transit line in Chicago that formed part of the city’s first rapid transit system on the West Side.
-
B.
Calumet and South Chicago Railway Company
The Calumet and South Chicago Railway Company was a street railway operator that provided transit services in Chicago’s South Side and surrounding industrial areas in the early 20th century.
-
C.
Chicago "L"
The Chicago "L" is the elevated rapid transit system serving Chicago and some surrounding suburbs, known for its iconic above-ground tracks and extensive urban rail network.
-
D.
Chicago Surface Lines
Chicago Surface Lines was a privately operated streetcar and bus system that provided most of Chicago’s surface public transportation in the first half of the 20th century.
-
E.
Chicago Rapid Transit Company
The Chicago Rapid Transit Company was the private operator of Chicago’s elevated “L” rail system in the early 20th century before public transit was consolidated under the Chicago Transit Authority.
- 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_69a2548debd48190ae3a06d6e65b53c6 |
completed | Feb. 28, 2026, 2:35 a.m. |
| NER | Named-entity recognition | batch_69a259669ba08190a5be1d2e10e70b27 |
completed | Feb. 28, 2026, 2:56 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69a405ef40248190b81d461f3b6d4baa |
completed | March 1, 2026, 9:25 a.m. |
| NEDg | Description generation | batch_69a406e41a18819085bb25ff4b1a0d3c |
completed | March 1, 2026, 9:29 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69a40740cc4c81909e4e3ff05f7e6c20 |
completed | March 1, 2026, 9:30 a.m. |
Created at: Feb. 28, 2026, 2:41 a.m.