Triple

T639118
Position Surface form Disambiguated ID Type / Status
Subject Mattapan Trolley E16691 entity
Predicate station P726 FINISHED
Object Capen Street station
Capen Street station is a small light rail stop on the MBTA's Mattapan trolley line in Milton, Massachusetts.
E131132 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: Capen Street station | Statement: [Mattapan Trolley, station, Capen Street station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Capen Street station
Context triple: [Mattapan Trolley, station, Capen Street station]
  • A. 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.
  • B. Sullivan Square station
    Sullivan Square station is a major multimodal transit hub in Boston, Massachusetts, serving MBTA Orange Line trains and numerous bus routes that connect the city and surrounding areas.
  • C. Heath Street station
    Heath Street station is the southern terminus of the MBTA Green Line E branch, serving Boston’s Mission Hill neighborhood with light rail service.
  • D. Park Street station
    Park Street station is a major downtown Boston transit hub on the MBTA system, serving multiple Green Line branches and providing connections to the Red Line.
  • E. North Bridge station
    North Bridge station was an early railway terminus in Edinburgh that later became part of what is now Edinburgh Waverley station.
  • 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: Capen Street station
Triple: [Mattapan Trolley, station, Capen Street station]
Generated description
Capen Street station is a small light rail stop on the MBTA's Mattapan trolley line in Milton, Massachusetts.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Capen Street station
Target entity description: Capen Street station is a small light rail stop on the MBTA's Mattapan trolley line in Milton, Massachusetts.
  • A. 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.
  • B. Sullivan Square station
    Sullivan Square station is a major multimodal transit hub in Boston, Massachusetts, serving MBTA Orange Line trains and numerous bus routes that connect the city and surrounding areas.
  • C. Heath Street station
    Heath Street station is the southern terminus of the MBTA Green Line E branch, serving Boston’s Mission Hill neighborhood with light rail service.
  • D. Park Street station
    Park Street station is a major downtown Boston transit hub on the MBTA system, serving multiple Green Line branches and providing connections to the Red Line.
  • E. North Bridge station
    North Bridge station was an early railway terminus in Edinburgh that later became part of what is now Edinburgh Waverley station.
  • 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_69ac5e92d6b0819091fad60317eee455 completed March 7, 2026, 5:21 p.m.
NEDg Description generation batch_69ac5f06ad4c8190b3b7b65084cc9fe8 completed March 7, 2026, 5:23 p.m.
NED2 Entity disambiguation (via description) batch_69ac5f9b8bf48190a42307ab7ef7d803 completed March 7, 2026, 5:25 p.m.
Created at: March 1, 2026, 7:35 p.m.