Triple

T639116
Position Surface form Disambiguated ID Type / Status
Subject Mattapan Trolley E16691 entity
Predicate station P726 FINISHED
Object Central Avenue station
Central Avenue station is a stop on Boston's MBTA Mattapan Trolley line serving the Milton area along the historic Ashmont–Mattapan High-Speed Line.
 E130085 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: Central Avenue station | Statement: [Mattapan Trolley, station, Central Avenue station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Central Avenue station
Context triple: [Mattapan Trolley, station, Central Avenue station]
  • A. Branch Avenue station
    Branch Avenue station is a Washington Metro rail station in Maryland that serves as the southern terminus of the system’s Green Line.
  • B. Pattison Avenue station
    Pattison Avenue station is a subway station in Philadelphia that serves as the southern terminus of SEPTA’s Broad Street Line, providing access to the South Philadelphia Sports Complex.
  • C. Crescent Street station
    Crescent Street station is a New York City Subway station in Brooklyn served by the J train.
  • D. 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.
  • E. Minnesota Avenue station
    Minnesota Avenue station is an elevated Washington Metro stop in Northeast Washington, D.C., serving the Orange Line near the Anacostia River.
  • 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: Central Avenue station
Triple: [Mattapan Trolley, station, Central Avenue station]
Generated description
Central Avenue station is a stop on Boston's MBTA Mattapan Trolley line serving the Milton area along the historic Ashmont–Mattapan High-Speed Line.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Central Avenue station
Target entity description: Central Avenue station is a stop on Boston's MBTA Mattapan Trolley line serving the Milton area along the historic Ashmont–Mattapan High-Speed Line.
  • A. Branch Avenue station
    Branch Avenue station is a Washington Metro rail station in Maryland that serves as the southern terminus of the system’s Green Line.
  • B. Pattison Avenue station
    Pattison Avenue station is a subway station in Philadelphia that serves as the southern terminus of SEPTA’s Broad Street Line, providing access to the South Philadelphia Sports Complex.
  • C. Crescent Street station
    Crescent Street station is a New York City Subway station in Brooklyn served by the J train.
  • D. 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.
  • E. Minnesota Avenue station
    Minnesota Avenue station is an elevated Washington Metro stop in Northeast Washington, D.C., serving the Orange Line near the Anacostia River.
  • 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_69a4936be1c88190af56540324b57da7 completed March 1, 2026, 7:28 p.m.
NER Named-entity recognition batch_69a49f00260081909d1a679182e23d10 completed March 1, 2026, 8:18 p.m.
NED1 Entity disambiguation (via context triple) batch_69ac5988ace881908f2884b5172be062 completed March 7, 2026, 4:59 p.m.
NEDg Description generation batch_69ac5a1fd5448190a72354c1017dfcf4 completed March 7, 2026, 5:02 p.m.
NED2 Entity disambiguation (via description) batch_69ac5a76e99c8190be49b80e31088693 completed March 7, 2026, 5:03 p.m.
Created at: March 1, 2026, 7:35 p.m.