Triple
T22923557
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Lake Street branch |
E569229
|
entity |
| Predicate | historicalOperator |
P2834
|
FINISHED |
| Object | Lake Street Elevated Railroad |
—
|
NE NERFINISHED |
How this triple was built (2 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: Lake Street Elevated Railroad | Statement: [Lake Street branch, historicalOperator, Lake Street Elevated Railroad]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Lake Street Elevated Railroad Context triple: [Lake Street branch, historicalOperator, Lake Street Elevated Railroad]
-
A.
Washington Street Elevated
Washington Street Elevated was a former elevated rapid transit line in Boston that once carried Orange Line trains along Washington Street through several neighborhoods.
-
B.
Metropolitan West Side Elevated Railroad
chosen
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.
-
C.
South Side Elevated branch
The South Side Elevated branch is a historic segment of Chicago's rapid transit system that serves the city's South Side as part of the Chicago "L" network.
-
D.
Boston Elevated Railway
The Boston Elevated Railway was a former public transit company that operated Boston’s early elevated and streetcar lines before being succeeded by the modern MBTA system known as “the T.”
-
E.
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.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Provenance (2 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_69e2458f7d008190901dccbaebeaba24 |
completed | April 17, 2026, 2:37 p.m. |
| NER | Named-entity recognition | batch_69f180d7973c8190b09a5690fd1d3f28 |
completed | April 29, 2026, 3:53 a.m. |
Created at: April 17, 2026, 3:43 p.m.