Triple
T21381205
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Panhandle Railroad Bridge |
E527360
|
entity |
| Predicate | usedBy |
P260
|
FINISHED |
| Object | Port Authority of Allegheny County light rail system |
—
|
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: Port Authority of Allegheny County light rail system | Statement: [Panhandle Railroad Bridge, usedBy, Port Authority of Allegheny County light rail system]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Port Authority of Allegheny County light rail system Context triple: [Panhandle Railroad Bridge, usedBy, Port Authority of Allegheny County light rail system]
-
A.
Pittsburgh Light Rail
chosen
Pittsburgh Light Rail is a light rail transit system serving Pittsburgh, Pennsylvania and its nearby neighborhoods, providing urban and commuter rail service including access to the city’s North Shore district.
-
B.
Pittsburgh Light Rail Silver Line
The Pittsburgh Light Rail Silver Line is a light rail service in Pittsburgh, Pennsylvania, that operates as part of the city's "T" system, connecting downtown with surrounding neighborhoods and suburbs.
-
C.
Pittsburgh Light Rail Blue Line
The Pittsburgh Light Rail Blue Line is a light rail service in Pittsburgh, Pennsylvania, that connects downtown with various southern suburbs as part of the Port Authority’s “T” system.
-
D.
Pittsburgh Light Rail Red Line
The Pittsburgh Light Rail Red Line is a major light rail route in Pittsburgh, Pennsylvania, connecting downtown with several southern neighborhoods and suburbs.
-
E.
Pittsburgh Light Rail subway trunk
The Pittsburgh Light Rail subway trunk is the central underground segment of Pittsburgh’s light rail system that carries trains through the city’s downtown core.
- 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_69e0b51f363c8190944000ab5523b02b |
completed | April 16, 2026, 10:08 a.m. |
| NER | Named-entity recognition | batch_69e8b0cec99881908481d0b08df358a8 |
completed | April 22, 2026, 11:28 a.m. |
Created at: April 16, 2026, 5:11 p.m.