Triple

T2383526
Position Surface form Disambiguated ID Type / Status
Subject Green Line (MBTA) E46364 entity
Predicate hasBranch P35 FINISHED
Object Green Line Medford/Tufts branch
The Green Line Medford/Tufts branch is an extension of Boston’s MBTA Green Line light rail that serves the Medford area, including Tufts University, as part of the Green Line Extension project.
 E385017 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: Green Line Medford/Tufts branch | Statement: [Green Line (MBTA), hasBranch, Green Line Medford/Tufts branch]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Green Line Medford/Tufts branch
Context triple: [Green Line (MBTA), hasBranch, Green Line Medford/Tufts branch]
  • A. Green Line (MBTA)
    The Green Line (MBTA) is Boston’s light rail/streetcar line, serving key neighborhoods and institutions from downtown through areas like Allston, Brookline, and the Longwood Medical Area.
  • B. MBTA Green Line C branch
    The MBTA Green Line C branch is a light rail service in Boston and Brookline that runs primarily along Beacon Street, connecting Cleveland Circle to downtown Boston.
  • C. MBTA Green Line B branch
    The MBTA Green Line B branch is a light rail service in Boston that runs along Commonwealth Avenue, primarily serving Boston University and the Allston–Brighton neighborhoods.
  • D. Green Line C Branch
    The Green Line C Branch is a light rail service of Boston's MBTA Green Line that runs primarily along Beacon Street between downtown Boston and the suburb of Brookline.
  • E. MBTA Green Line E branch
    The MBTA Green Line E branch is a light rail line in Boston that runs from downtown through the Back Bay and Longwood Medical Area to Heath Street, serving major hospitals, universities, and residential neighborhoods.
  • 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: Green Line Medford/Tufts branch
Triple: [Green Line (MBTA), hasBranch, Green Line Medford/Tufts branch]
Generated description
The Green Line Medford/Tufts branch is an extension of Boston’s MBTA Green Line light rail that serves the Medford area, including Tufts University, as part of the Green Line Extension project.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Green Line Medford/Tufts branch
Target entity description: The Green Line Medford/Tufts branch is an extension of Boston’s MBTA Green Line light rail that serves the Medford area, including Tufts University, as part of the Green Line Extension project.
  • A. Green Line (MBTA)
    The Green Line (MBTA) is Boston’s light rail/streetcar line, serving key neighborhoods and institutions from downtown through areas like Allston, Brookline, and the Longwood Medical Area.
  • B. MBTA Green Line C branch
    The MBTA Green Line C branch is a light rail service in Boston and Brookline that runs primarily along Beacon Street, connecting Cleveland Circle to downtown Boston.
  • C. MBTA Green Line B branch
    The MBTA Green Line B branch is a light rail service in Boston that runs along Commonwealth Avenue, primarily serving Boston University and the Allston–Brighton neighborhoods.
  • D. Green Line C Branch
    The Green Line C Branch is a light rail service of Boston's MBTA Green Line that runs primarily along Beacon Street between downtown Boston and the suburb of Brookline.
  • E. MBTA Green Line E branch
    The MBTA Green Line E branch is a light rail line in Boston that runs from downtown through the Back Bay and Longwood Medical Area to Heath Street, serving major hospitals, universities, and residential neighborhoods.
  • 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_69a88a1554a48190a0180682bcf099be completed March 4, 2026, 7:37 p.m.
NER Named-entity recognition batch_69abc7bafa248190a68e8f1e081f4817 completed March 7, 2026, 6:37 a.m.
NED1 Entity disambiguation (via context triple) batch_69b4dae21cf08190913e7b764b3acb20 completed March 14, 2026, 3:49 a.m.
NEDg Description generation batch_69b4dc2c274c8190a7c8fa419186e188 completed March 14, 2026, 3:55 a.m.
NED2 Entity disambiguation (via description) batch_69b4e0065b008190b2ad78546e563b4d completed March 14, 2026, 4:11 a.m.
Created at: March 4, 2026, 7:57 p.m.