Triple

T92357
Position Surface form Disambiguated ID Type / Status
Subject SEPTA Subway–Surface Trolley Lines E1855 entity
Predicate centralTunnelTerminus P388 FINISHED
Object 15th Street station
15th Street station is a major underground transit hub in Center City Philadelphia that connects SEPTA’s subway–surface trolleys with the Market–Frankford Line and nearby regional rail services.
E26317 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: 15th Street station | Statement: [SEPTA Subway–Surface Trolley Lines, centralTunnelTerminus, 15th Street station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: 15th Street station
Context triple: [SEPTA Subway–Surface Trolley Lines, centralTunnelTerminus, 15th Street station]
  • A. 13th Street station
    13th Street station is a major underground transit stop in Center City Philadelphia serving SEPTA’s Subway–Surface Trolley Lines and connecting to other regional rail and subway services.
  • B. Eisenhower Avenue station
    Eisenhower Avenue station is a Washington Metro rapid transit stop serving the Yellow Line in Alexandria, Virginia, near the Eisenhower Avenue corridor and adjacent commercial and residential areas.
  • C. 57th Street–Seventh Avenue station
    The 57th Street–Seventh Avenue station is a New York City Subway station in Midtown Manhattan serving the BMT Broadway Line near major cultural and commercial landmarks.
  • D. Fulton Street station
    Fulton Street station is a major New York City Subway complex in Lower Manhattan that serves multiple lines and connects to the Fulton Center transit hub.
  • E. Belmont Center station
    Belmont Center station is a Massachusetts Bay Transportation Authority (MBTA) commuter rail stop located in the commercial center of Belmont, Massachusetts.
  • 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: 15th Street station
Triple: [SEPTA Subway–Surface Trolley Lines, centralTunnelTerminus, 15th Street station]
Generated description
15th Street station is a major underground transit hub in Center City Philadelphia that connects SEPTA’s subway–surface trolleys with the Market–Frankford Line and nearby regional rail services.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: 15th Street station
Target entity description: 15th Street station is a major underground transit hub in Center City Philadelphia that connects SEPTA’s subway–surface trolleys with the Market–Frankford Line and nearby regional rail services.
  • A. 13th Street station
    13th Street station is a major underground transit stop in Center City Philadelphia serving SEPTA’s Subway–Surface Trolley Lines and connecting to other regional rail and subway services.
  • B. Eisenhower Avenue station
    Eisenhower Avenue station is a Washington Metro rapid transit stop serving the Yellow Line in Alexandria, Virginia, near the Eisenhower Avenue corridor and adjacent commercial and residential areas.
  • C. 57th Street–Seventh Avenue station
    The 57th Street–Seventh Avenue station is a New York City Subway station in Midtown Manhattan serving the BMT Broadway Line near major cultural and commercial landmarks.
  • D. Fulton Street station
    Fulton Street station is a major New York City Subway complex in Lower Manhattan that serves multiple lines and connects to the Fulton Center transit hub.
  • E. Belmont Center station
    Belmont Center station is a Massachusetts Bay Transportation Authority (MBTA) commuter rail stop located in the commercial center of Belmont, Massachusetts.
  • 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_69a24d1a97dc819094e6c021fe9b05a7 completed Feb. 28, 2026, 2:04 a.m.
NER Named-entity recognition batch_69a2567dd770819088eb77ffc6d2d1cf completed Feb. 28, 2026, 2:44 a.m.
NED1 Entity disambiguation (via context triple) batch_69a32bc28a008190a63df84b5ab90679 completed Feb. 28, 2026, 5:54 p.m.
NEDg Description generation batch_69a32c6747fc81909a51eebe410bffac completed Feb. 28, 2026, 5:56 p.m.
NED2 Entity disambiguation (via description) batch_69a32cbc7db08190a94e1ac4d35ca257 completed Feb. 28, 2026, 5:58 p.m.
Created at: Feb. 28, 2026, 2:07 a.m.