Triple
T844971
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Purple Line (CTA) |
E18256
|
entity |
| Predicate | hasStation |
P35
|
FINISHED |
| Object |
Foster station
Foster station is a former Chicago Transit Authority 'L' rapid transit stop that once served the Purple Line in Chicago, Illinois.
|
E128948
|
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: Foster station | Statement: [Purple Line (CTA), hasStation, Foster station]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Foster station Context triple: [Purple Line (CTA), hasStation, Foster station]
-
A.
Waban station
Waban station is a light rail stop on Boston's MBTA Green Line located in the Waban neighborhood of Newton, Massachusetts.
-
B.
McCowan station
McCowan station is an elevated Toronto subway station in Scarborough that served as the eastern terminus of the former Line 3 Scarborough.
-
C.
St. Clair station
St. Clair station is a Toronto Transit Commission subway station on Line 1 in midtown Toronto, serving the St. Clair Avenue and Yonge Street area with connections to streetcar and bus routes.
-
D.
Crestmont station
Crestmont station is a SEPTA Regional Rail stop in Abington Township, Pennsylvania, serving passengers on the Warminster Line.
-
E.
Logan station
Logan station is an underground rapid transit stop in Philadelphia, Pennsylvania, serving the Logan neighborhood on SEPTA’s Broad Street Line.
- 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: Foster station Triple: [Purple Line (CTA), hasStation, Foster station]
Generated description
Foster station is a former Chicago Transit Authority 'L' rapid transit stop that once served the Purple Line in Chicago, Illinois.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Foster station Target entity description: Foster station is a former Chicago Transit Authority 'L' rapid transit stop that once served the Purple Line in Chicago, Illinois.
-
A.
Waban station
Waban station is a light rail stop on Boston's MBTA Green Line located in the Waban neighborhood of Newton, Massachusetts.
-
B.
McCowan station
McCowan station is an elevated Toronto subway station in Scarborough that served as the eastern terminus of the former Line 3 Scarborough.
-
C.
St. Clair station
St. Clair station is a Toronto Transit Commission subway station on Line 1 in midtown Toronto, serving the St. Clair Avenue and Yonge Street area with connections to streetcar and bus routes.
-
D.
Crestmont station
Crestmont station is a SEPTA Regional Rail stop in Abington Township, Pennsylvania, serving passengers on the Warminster Line.
-
E.
Logan station
Logan station is an underground rapid transit stop in Philadelphia, Pennsylvania, serving the Logan neighborhood on SEPTA’s Broad Street Line.
- 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_69a4938b04208190b82e1df6b572c548 |
completed | March 1, 2026, 7:29 p.m. |
| NER | Named-entity recognition | batch_69a4ac09249c8190a8099b94a3c9e2cc |
completed | March 1, 2026, 9:13 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69ac537700548190aa8ead8c966eb329 |
completed | March 7, 2026, 4:33 p.m. |
| NEDg | Description generation | batch_69ac55dbc1888190be7899f0e303e8a2 |
completed | March 7, 2026, 4:44 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69ac56488f4c819097adf85a5ed28818 |
completed | March 7, 2026, 4:46 p.m. |
Created at: March 1, 2026, 7:38 p.m.