Triple

T8041041
Position Surface form Disambiguated ID Type / Status
Subject Cheltenham Avenue (north end) E187438 entity
Predicate relatedTo P37 FINISHED
Object Broad Street Line (Philadelphia subway) terminus area
The Broad Street Line (Philadelphia subway) terminus area is the northern endpoint of SEPTA’s primary north–south rapid transit route in Philadelphia, where trains turn around near the city’s border with Cheltenham Township.
E706704 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: Broad Street Line (Philadelphia subway) terminus area | Statement: [Cheltenham Avenue (north end), relatedTo, Broad Street Line (Philadelphia subway) terminus area]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Broad Street Line (Philadelphia subway) terminus area
Context triple: [Cheltenham Avenue (north end), relatedTo, Broad Street Line (Philadelphia subway) terminus area]
  • A. Broad Street Line Walnut–Locust station
    Broad Street Line Walnut–Locust station is an underground SEPTA subway station in Center City Philadelphia serving the Broad Street Line near the city’s theater and cultural district.
  • B. Broad Street Station (Philadelphia)
    Broad Street Station (Philadelphia) was a grand former railroad terminal in Center City Philadelphia that served as the Pennsylvania Railroad’s primary passenger station and a major hub of rail travel in the late 19th and early 20th centuries.
  • C. City Hall Station (Philadelphia)
    City Hall Station (Philadelphia) is a major underground transit hub in Center City that serves as a key interchange point for multiple SEPTA subway and trolley lines beneath Philadelphia’s City Hall.
  • D. Erie station (Broad Street Line)
    Erie station (Broad Street Line) is a rapid transit station on SEPTA's Broad Street Line in Philadelphia, Pennsylvania.
  • E. Girard station (Broad Street Line)
    Girard station (Broad Street Line) is an underground rapid transit station in Philadelphia, Pennsylvania, located along SEPTA’s Broad Street Line near the intersection of Girard Avenue and Broad Street.
  • 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: Broad Street Line (Philadelphia subway) terminus area
Triple: [Cheltenham Avenue (north end), relatedTo, Broad Street Line (Philadelphia subway) terminus area]
Generated description
The Broad Street Line (Philadelphia subway) terminus area is the northern endpoint of SEPTA’s primary north–south rapid transit route in Philadelphia, where trains turn around near the city’s border with Cheltenham Township.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Broad Street Line (Philadelphia subway) terminus area
Target entity description: The Broad Street Line (Philadelphia subway) terminus area is the northern endpoint of SEPTA’s primary north–south rapid transit route in Philadelphia, where trains turn around near the city’s border with Cheltenham Township.
  • A. Broad Street Line Walnut–Locust station
    Broad Street Line Walnut–Locust station is an underground SEPTA subway station in Center City Philadelphia serving the Broad Street Line near the city’s theater and cultural district.
  • B. Broad Street Station (Philadelphia)
    Broad Street Station (Philadelphia) was a grand former railroad terminal in Center City Philadelphia that served as the Pennsylvania Railroad’s primary passenger station and a major hub of rail travel in the late 19th and early 20th centuries.
  • C. City Hall Station (Philadelphia)
    City Hall Station (Philadelphia) is a major underground transit hub in Center City that serves as a key interchange point for multiple SEPTA subway and trolley lines beneath Philadelphia’s City Hall.
  • D. Erie station (Broad Street Line)
    Erie station (Broad Street Line) is a rapid transit station on SEPTA's Broad Street Line in Philadelphia, Pennsylvania.
  • E. Girard station (Broad Street Line)
    Girard station (Broad Street Line) is an underground rapid transit station in Philadelphia, Pennsylvania, located along SEPTA’s Broad Street Line near the intersection of Girard Avenue and Broad Street.
  • 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_69ca82b00cb48190b59a300f70e97bd7 completed March 30, 2026, 2:03 p.m.
NER Named-entity recognition batch_69cb3f1d62c48190bf4a6cd17517c5dc completed March 31, 2026, 3:27 a.m.
NED1 Entity disambiguation (via context triple) batch_69cc5706a4a881909758ea34cf5c0cf2 completed March 31, 2026, 11:21 p.m.
NEDg Description generation batch_69cc58abd96c8190ab9eeaece67d5408 completed March 31, 2026, 11:28 p.m.
NED2 Entity disambiguation (via description) batch_69cc5cc9161c8190aae90f453f6d98c0 completed March 31, 2026, 11:46 p.m.
Created at: March 30, 2026, 5:23 p.m.