Triple
T13233372
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | PCC streetcar |
E315076
|
entity |
| Predicate | notableOperator |
P179
|
FINISHED |
| Object | Pittsburgh Railways Company |
E315078
|
NE FINISHED |
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: Pittsburgh Railways Company | Statement: [PCC streetcar, notableOperator, Pittsburgh Railways Company]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Pittsburgh Railways Company Context triple: [PCC streetcar, notableOperator, Pittsburgh Railways Company]
-
A.
Pittsburgh Railways
chosen
Pittsburgh Railways was a major streetcar and public transit operator in Pittsburgh, Pennsylvania, known for running one of the largest PCC streetcar fleets in the United States.
-
B.
Pittsburgh and Lake Erie Railroad
The Pittsburgh and Lake Erie Railroad was a regional U.S. railroad based in western Pennsylvania and eastern Ohio, known for its heavy involvement in transporting steel and industrial freight.
-
C.
Pittsburgh and West Virginia Railway
The Pittsburgh and West Virginia Railway was a regional railroad that operated in the Appalachian area, providing freight and passenger service across parts of Pennsylvania and West Virginia.
-
D.
Erie Lackawanna Railway
Erie Lackawanna Railway was a mid-20th-century U.S. railroad formed from the merger of the Erie Railroad and the Delaware, Lackawanna and Western Railroad, known for serving the Northeast and Midwest before its assets were absorbed into Conrail.
-
E.
Pennsylvania Railroad Company
The Pennsylvania Railroad Company was one of the largest and most influential American railroads of the 19th and early 20th centuries, playing a central role in the industrial development of the United States.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Provenance (3 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_69d806affc688190a25b6ccc588e9c72 |
completed | April 9, 2026, 8:06 p.m. |
| NER | Named-entity recognition | batch_69d98d34ff288190bdb550a019b7a470 |
completed | April 10, 2026, 11:52 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69f6ff2dca2c81909cab1aa868ad575d |
completed | May 3, 2026, 7:54 a.m. |
Created at: April 9, 2026, 9:22 p.m.