Triple
T589755
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Central Subway |
E17240
|
entity |
| Predicate | hasStation |
P35
|
FINISHED |
| Object |
Union Square/Market Street station
Union Square/Market Street station is an underground San Francisco Muni Metro station serving the Central Subway near the Union Square and Market Street area.
|
E75752
|
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: Union Square/Market Street station | Statement: [Central Subway, hasStation, Union Square/Market Street station]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Union Square/Market Street station Context triple: [Central Subway, hasStation, Union Square/Market Street station]
-
A.
Montgomery Street station
Montgomery Street station is a major Bay Area Rapid Transit (BART) and Muni Metro subway station serving downtown San Francisco’s Financial District.
-
B.
San Francisco 4th and King Street station
San Francisco 4th and King Street station is a major commuter rail terminal in San Francisco that serves as the northern terminus for Caltrain services between the city and the Peninsula/Silicon Valley.
-
C.
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.
-
D.
Heath Street station
Heath Street station is the southern terminus of the MBTA Green Line E branch, serving Boston’s Mission Hill neighborhood with light rail service.
-
E.
19th Street station
19th Street station is an underground trolley stop in Center City Philadelphia serving SEPTA’s Subway–Surface Trolley Lines.
- 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: Union Square/Market Street station Triple: [Central Subway, hasStation, Union Square/Market Street station]
Generated description
Union Square/Market Street station is an underground San Francisco Muni Metro station serving the Central Subway near the Union Square and Market Street area.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Union Square/Market Street station Target entity description: Union Square/Market Street station is an underground San Francisco Muni Metro station serving the Central Subway near the Union Square and Market Street area.
-
A.
Montgomery Street station
Montgomery Street station is a major Bay Area Rapid Transit (BART) and Muni Metro subway station serving downtown San Francisco’s Financial District.
-
B.
San Francisco 4th and King Street station
San Francisco 4th and King Street station is a major commuter rail terminal in San Francisco that serves as the northern terminus for Caltrain services between the city and the Peninsula/Silicon Valley.
-
C.
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.
-
D.
Heath Street station
Heath Street station is the southern terminus of the MBTA Green Line E branch, serving Boston’s Mission Hill neighborhood with light rail service.
-
E.
19th Street station
19th Street station is an underground trolley stop in Center City Philadelphia serving SEPTA’s Subway–Surface Trolley Lines.
- 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_69a49379d09c8190ac7e00b24e2810b1 |
completed | March 1, 2026, 7:28 p.m. |
| NER | Named-entity recognition | batch_69a49bb775fc819085b968f8615dca59 |
completed | March 1, 2026, 8:04 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69a5238759c88190b1a960291c758447 |
completed | March 2, 2026, 5:43 a.m. |
| NEDg | Description generation | batch_69a524233d34819092c15fdc9d6b6411 |
completed | March 2, 2026, 5:46 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69a524a0b00c8190951d1e279226ef50 |
completed | March 2, 2026, 5:48 a.m. |
Created at: March 1, 2026, 7:33 p.m.