Triple

T781569
Position Surface form Disambiguated ID Type / Status
Subject MBTA Green Line D branch E16506 entity
Predicate servesStation P839 FINISHED
Object Boylston station
Boylston station is a historic light rail stop in downtown Boston, Massachusetts, located on the MBTA Green Line and known for its early 20th-century subway architecture.
 E52583 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: Boylston station | Statement: [MBTA Green Line D branch, servesStation, Boylston station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Boylston station
Context triple: [MBTA Green Line D branch, servesStation, Boylston station]
  • A. Boylston station
    Boylston station is a historic underground light rail stop in downtown Boston that serves the MBTA Green Line.
  • B. 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.
  • C. Brookline Village station
    Brookline Village station is a light rail stop on the Massachusetts Bay Transportation Authority’s Green Line in the Brookline neighborhood just outside Boston.
  • D. Quincy Center station
    Quincy Center station is a major MBTA Red Line rapid transit and commuter rail hub located in downtown Quincy, Massachusetts.
  • E. Fenway station
    Fenway station is a light rail stop on Boston’s MBTA Green Line serving the Fenway–Kenmore area near Fenway Park.
  • 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: Boylston station
Triple: [MBTA Green Line D branch, servesStation, Boylston station]
Generated description
Boylston station is a historic light rail stop in downtown Boston, Massachusetts, located on the MBTA Green Line and known for its early 20th-century subway architecture.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Boylston station
Target entity description: Boylston station is a historic light rail stop in downtown Boston, Massachusetts, located on the MBTA Green Line and known for its early 20th-century subway architecture.
  • A. Boylston station chosen
    Boylston station is a historic underground light rail stop in downtown Boston that serves the MBTA Green Line.
  • B. 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.
  • C. Brookline Village station
    Brookline Village station is a light rail stop on the Massachusetts Bay Transportation Authority’s Green Line in the Brookline neighborhood just outside Boston.
  • D. Quincy Center station
    Quincy Center station is a major MBTA Red Line rapid transit and commuter rail hub located in downtown Quincy, Massachusetts.
  • E. Fenway station
    Fenway station is a light rail stop on Boston’s MBTA Green Line serving the Fenway–Kenmore area near Fenway Park.
  • F. None of above.

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_69a4936ad1fc81908f190208059ccf78 completed March 1, 2026, 7:28 p.m.
NER Named-entity recognition batch_69a4a751ea3481908a622d5255249883 completed March 1, 2026, 8:53 p.m.
NED1 Entity disambiguation (via context triple) batch_69acd46422408190911e6eaec5866fe8 completed March 8, 2026, 1:44 a.m.
NEDg Description generation batch_69acd4fade9881908ed8e4598f4821f6 completed March 8, 2026, 1:46 a.m.
NED2 Entity disambiguation (via description) batch_69acd55b90608190a5ff734af6264ab5 completed March 8, 2026, 1:48 a.m.
Created at: March 1, 2026, 7:37 p.m.