Triple
T1817564
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Sound Transit |
E40468
|
entity |
| Predicate | operates |
P24
|
FINISHED |
| Object |
Tacoma Link light rail
Tacoma Link light rail is a streetcar-style light rail line serving downtown Tacoma, Washington, as part of the regional Sound Transit network.
|
E40468
|
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: Tacoma Link light rail | Statement: [Sound Transit, operates, Tacoma Link light rail]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Tacoma Link light rail Context triple: [Sound Transit, operates, Tacoma Link light rail]
-
A.
Sound Transit Link light rail
Sound Transit Link light rail is a regional rapid transit system serving Seattle and surrounding communities with frequent, high-capacity train service.
-
B.
Sound Transit
Sound Transit is the regional public transit agency that plans, builds, and operates light rail, commuter rail, and express bus services in the greater Puget Sound area of Washington State.
-
C.
Transbay Tube
The Transbay Tube is an underwater rail tunnel beneath San Francisco Bay that carries BART trains between San Francisco and Oakland.
-
D.
The Tide light rail system
The Tide light rail system is an urban light rail transit network serving the city of Norfolk and surrounding areas in southeastern Virginia.
-
E.
Seattle Center Monorail
The Seattle Center Monorail is an elevated rapid transit line in Seattle that connects downtown to the Seattle Center, originally built for the 1962 World's Fair and now operating as a short but iconic urban transit link and tourist attraction.
- 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: Tacoma Link light rail Triple: [Sound Transit, operates, Tacoma Link light rail]
Generated description
Tacoma Link light rail is a streetcar-style light rail line serving downtown Tacoma, Washington, as part of the regional Sound Transit network.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Tacoma Link light rail Target entity description: Tacoma Link light rail is a streetcar-style light rail line serving downtown Tacoma, Washington, as part of the regional Sound Transit network.
-
A.
Sound Transit Link light rail
Sound Transit Link light rail is a regional rapid transit system serving Seattle and surrounding communities with frequent, high-capacity train service.
-
B.
Sound Transit
chosen
Sound Transit is the regional public transit agency that plans, builds, and operates light rail, commuter rail, and express bus services in the greater Puget Sound area of Washington State.
-
C.
Transbay Tube
The Transbay Tube is an underwater rail tunnel beneath San Francisco Bay that carries BART trains between San Francisco and Oakland.
-
D.
The Tide light rail system
The Tide light rail system is an urban light rail transit network serving the city of Norfolk and surrounding areas in southeastern Virginia.
-
E.
Seattle Center Monorail
The Seattle Center Monorail is an elevated rapid transit line in Seattle that connects downtown to the Seattle Center, originally built for the 1962 World's Fair and now operating as a short but iconic urban transit link and tourist attraction.
- F. None of above.
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_69a8864526c081908a3a4d74f689e2c5 |
completed | March 4, 2026, 7:21 p.m. |
| NER | Named-entity recognition | batch_69aa65f7b84081909005ce36ef1199db |
completed | March 6, 2026, 5:28 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69adbf6019bc81909266b7f03b282f34 |
completed | March 8, 2026, 6:26 p.m. |
| NEDg | Description generation | batch_69adc3557d988190ae04df41e81bc842 |
completed | March 8, 2026, 6:43 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69adc3fadd08819090f9eedb4688cd4a |
completed | March 8, 2026, 6:46 p.m. |
Created at: March 4, 2026, 7:32 p.m.