Triple

T886268
Position Surface form Disambiguated ID Type / Status
Subject Ashmont branch E19136 entity
Predicate hasStation P35 FINISHED
Object Mattapan station
Mattapan station is a transit station in Boston, Massachusetts, serving as the terminus of the MBTA's Ashmont–Mattapan High-Speed Line.
E178391 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: Mattapan station | Statement: [Ashmont branch, hasStation, Mattapan station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Mattapan station
Context triple: [Ashmont branch, hasStation, Mattapan station]
  • A. Malden Center station
    Malden Center station is a major transit hub in Malden, Massachusetts, serving both MBTA Orange Line subway and commuter rail services.
  • B. Belmont station
    Belmont station is a major Chicago Transit Authority 'L' station on the North Side that serves as a key transfer point between multiple rapid transit lines.
  • C. Porter station
    Porter station is a major MBTA transit hub in Cambridge, Massachusetts, serving both Red Line subway and commuter rail trains beneath Porter Square.
  • D. Massapequa station
    Massapequa station is a Long Island Rail Road commuter rail stop in Massapequa, New York, serving riders on the busy Babylon Branch between New York City and eastern Long Island.
  • E. Copley station
    Copley station is a major underground MBTA subway stop in Boston’s Back Bay neighborhood, serving multiple branches of the Green Line and providing access to nearby landmarks like Copley Square and the Boston Public Library.
  • 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: Mattapan station
Triple: [Ashmont branch, hasStation, Mattapan station]
Generated description
Mattapan station is a transit station in Boston, Massachusetts, serving as the terminus of the MBTA's Ashmont–Mattapan High-Speed Line.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Mattapan station
Target entity description: Mattapan station is a transit station in Boston, Massachusetts, serving as the terminus of the MBTA's Ashmont–Mattapan High-Speed Line.
  • A. Malden Center station
    Malden Center station is a major transit hub in Malden, Massachusetts, serving both MBTA Orange Line subway and commuter rail services.
  • B. Belmont station
    Belmont station is a major Chicago Transit Authority 'L' station on the North Side that serves as a key transfer point between multiple rapid transit lines.
  • C. Porter station
    Porter station is a major MBTA transit hub in Cambridge, Massachusetts, serving both Red Line subway and commuter rail trains beneath Porter Square.
  • D. Massapequa station
    Massapequa station is a Long Island Rail Road commuter rail stop in Massapequa, New York, serving riders on the busy Babylon Branch between New York City and eastern Long Island.
  • E. Copley station
    Copley station is a major underground MBTA subway stop in Boston’s Back Bay neighborhood, serving multiple branches of the Green Line and providing access to nearby landmarks like Copley Square and the Boston Public Library.
  • 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_69a4939c32488190a7ccd41cf0abb22b completed March 1, 2026, 7:29 p.m.
NER Named-entity recognition batch_69a4ace714ec81909b0b1deaeac66be5 completed March 1, 2026, 9:17 p.m.
NED1 Entity disambiguation (via context triple) batch_69ad3ff724248190aacb72d105f0bb34 completed March 8, 2026, 9:23 a.m.
NEDg Description generation batch_69ad40a795608190bcb4e0ac13417cc4 completed March 8, 2026, 9:25 a.m.
NED2 Entity disambiguation (via description) batch_69ad410ccb448190b8b6096096660d79 completed March 8, 2026, 9:27 a.m.
Created at: March 1, 2026, 7:39 p.m.