Triple
T7678856
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Pleasant Hill, California |
E173935
|
entity |
| Predicate | nearestBARTStation |
P4625
|
FINISHED |
| Object |
Pleasant Hill/Contra Costa Centre station
Pleasant Hill/Contra Costa Centre station is a Bay Area Rapid Transit (BART) station in Contra Costa County, California, serving the Pleasant Hill and Contra Costa Centre communities along the Pittsburg/Bay Point–SFO/Millbrae line.
|
E681410
|
NE FINISHED |
How this triple was built (4 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: Pleasant Hill/Contra Costa Centre station | Statement: [Pleasant Hill, California, nearestBARTStation, Pleasant Hill/Contra Costa Centre station]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Pleasant Hill/Contra Costa Centre station Context triple: [Pleasant Hill, California, nearestBARTStation, Pleasant Hill/Contra Costa Centre station]
-
A.
Emeryville station
Emeryville station is a major Amtrak rail terminal in Emeryville, California, serving as the primary San Francisco–area hub and western terminus for long-distance routes like the California Zephyr.
-
B.
Castro Valley station
Castro Valley station is a Bay Area Rapid Transit (BART) station in Castro Valley, California, serving as a regional commuter rail stop in the East Bay.
-
C.
Walnut Creek station
Walnut Creek station is a Bay Area Rapid Transit (BART) station in Walnut Creek, California, serving as a key transit hub for commuters in the East Bay region.
-
D.
Alameda station
Alameda station is an underground interchange station on the Lisbon Metro system, serving as a key connection point between multiple metro lines in the city.
-
E.
Millbrae station
Millbrae station is a major intermodal transit hub in Millbrae, California, serving as a connection point between Caltrain commuter rail, BART rapid transit, and other local transportation services.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg
Description generation
gpt-5.1
Instruction
Generate a one-sentence description of the target entity. You are given a context triple in the form (subject, predicate, object), where the object is the target entity. # Instructions Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. Avoid repeating the information from the triple, unless really essential. # Response Format Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Pleasant Hill/Contra Costa Centre station Triple: [Pleasant Hill, California, nearestBARTStation, Pleasant Hill/Contra Costa Centre station]
Generated description
Pleasant Hill/Contra Costa Centre station is a Bay Area Rapid Transit (BART) station in Contra Costa County, California, serving the Pleasant Hill and Contra Costa Centre communities along the Pittsburg/Bay Point–SFO/Millbrae line.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Pleasant Hill/Contra Costa Centre station Target entity description: Pleasant Hill/Contra Costa Centre station is a Bay Area Rapid Transit (BART) station in Contra Costa County, California, serving the Pleasant Hill and Contra Costa Centre communities along the Pittsburg/Bay Point–SFO/Millbrae line.
-
A.
Emeryville station
Emeryville station is a major Amtrak rail terminal in Emeryville, California, serving as the primary San Francisco–area hub and western terminus for long-distance routes like the California Zephyr.
-
B.
Castro Valley station
Castro Valley station is a Bay Area Rapid Transit (BART) station in Castro Valley, California, serving as a regional commuter rail stop in the East Bay.
-
C.
Walnut Creek station
Walnut Creek station is a Bay Area Rapid Transit (BART) station in Walnut Creek, California, serving as a key transit hub for commuters in the East Bay region.
-
D.
Alameda station
Alameda station is an underground interchange station on the Lisbon Metro system, serving as a key connection point between multiple metro lines in the city.
-
E.
Millbrae station
Millbrae station is a major intermodal transit hub in Millbrae, California, serving as a connection point between Caltrain commuter rail, BART rapid transit, and other local transportation services.
- F. None of above. chosen
Provenance (5 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_69c6995703e0819081de77361b602e78 |
completed | March 27, 2026, 2:51 p.m. |
| NER | Named-entity recognition | batch_69c701fe2cc88190b5fd5e1378c32e5b |
completed | March 27, 2026, 10:17 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69c8a248750481908f0de08aee78c9ba |
completed | March 29, 2026, 3:53 a.m. |
| NEDg | Description generation | batch_69c8a2fd5a348190a952f6cc3e622474 |
completed | March 29, 2026, 3:56 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69c8a3a570948190ba733c3c858d4bfd |
completed | March 29, 2026, 3:59 a.m. |
Created at: March 27, 2026, 4:01 p.m.