Triple
T17403326
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | West Oakland station |
E423150
|
entity |
| Predicate | precedingStationDirectionWest |
P66132
|
FINISHED |
| Object | Transbay Tube (toward San Francisco) |
—
|
NE NERFINISHED |
How this triple was built (3 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: Transbay Tube (toward San Francisco) | Statement: [West Oakland station, precedingStationDirectionWest, Transbay Tube (toward San Francisco)]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Transbay Tube (toward San Francisco) Context triple: [West Oakland station, precedingStationDirectionWest, Transbay Tube (toward San Francisco)]
-
A.
Transbay Tube
chosen
The Transbay Tube is an underwater rail tunnel beneath San Francisco Bay that carries BART trains between San Francisco and Oakland.
-
B.
Yerba Buena Tunnel
Yerba Buena Tunnel is a vehicular tunnel in the San Francisco Bay that carries the San Francisco–Oakland Bay Bridge through Yerba Buena Island, connecting its eastern and western spans.
-
C.
San Francisco–San Jose rail corridor
The San Francisco–San Jose rail corridor is a major commuter and intercity rail line on the San Francisco Peninsula that connects San Francisco and San Jose, primarily served by Caltrain.
-
D.
San Francisco coastal transportation corridor
The San Francisco coastal transportation corridor is a scenic route along the city’s Pacific shoreline that links beaches, parks, and neighborhoods via roads, trails, and transit infrastructure.
-
E.
Transbay BART network
The Transbay BART network is the portion of the Bay Area Rapid Transit system that carries trains through the Transbay Tube between San Francisco and the East Bay, forming a critical regional rail link under San Francisco Bay.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
PD
Predicate disambiguation
gpt-5-mini-2025-08-07
Target predicate: precedingStationDirectionWest Context triple: [West Oakland station, precedingStationDirectionWest, Transbay Tube (toward San Francisco)]
-
A.
adjacentStationWest
Indicates that one station is immediately to the west of another station in a spatial or network layout.
-
B.
precedingStation
chosen
Indicates that one station is located immediately before another station in a route or sequence.
-
C.
adjacentStationOnCentralLineTowardsWest
Indicates that one station is directly next to another on the Central Line in the westbound direction.
-
D.
precedingStationOnLine4
Indicates that one station is immediately before another station in the ordered sequence of stops on transit line 4.
-
E.
hasAdjacentStationDirectionNorthwest
Indicates that one station is directly adjacent to another in the northwest direction.
- F. None of above.
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_69d889d7d27c819088486ce3f0627fa1 |
completed | April 10, 2026, 5:25 a.m. |
| NER | Named-entity recognition | batch_69e43b051cc48190872278ee0b52240d |
completed | April 19, 2026, 2:16 a.m. |
| PD | Predicate disambiguation | batch_69e3b02e6cc88190986e85e64ce9383e |
completed | April 18, 2026, 4:24 p.m. |
Created at: April 10, 2026, 5:45 a.m.