Triple
T21789815
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Palo Alto Caltrain Station |
E537939
|
entity |
| Predicate | servedBy |
P82
|
FINISHED |
| Object | Caltrain |
—
|
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: Caltrain | Statement: [Palo Alto Caltrain Station, servedBy, Caltrain]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Caltrain Context triple: [Palo Alto Caltrain Station, servedBy, Caltrain]
-
A.
Caltrain
chosen
Caltrain is a commuter rail service on the San Francisco Peninsula and in the Santa Clara Valley, connecting San Francisco to San Jose and Gilroy in California.
-
B.
San Francisco (Caltrain)
San Francisco (Caltrain) is the northern terminus and major commuter rail station of the Caltrain line serving the San Francisco Bay Area.
-
C.
Sonoma–Marin Area Rail Transit
Sonoma–Marin Area Rail Transit is a commuter rail system in California’s North Bay that provides passenger service along the Highway 101 corridor in Sonoma and Marin counties.
-
D.
Altamont Corridor Express
Altamont Corridor Express is a commuter rail service in Northern California that connects Central Valley communities with the San Francisco Bay Area.
-
E.
BART Antioch–SFO+Millbrae line
The BART Antioch–SFO+Millbrae line is a Bay Area Rapid Transit service that runs between Antioch in the East Bay and San Francisco International Airport and Millbrae, connecting suburban communities with major regional transit hubs.
- 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_69e0c47198f881908cb0d237266c10e9 |
completed | April 16, 2026, 11:13 a.m. |
| NER | Named-entity recognition | batch_69f0621ed2b481909e3df17aee9cd8f7 |
completed | April 28, 2026, 7:30 a.m. |
Created at: April 16, 2026, 6:52 p.m.