Triple

T8003205
Position Surface form Disambiguated ID Type / Status
Subject Silver Line (MBTA) E186300 entity
Predicate hasRoute P4374 FINISHED
Object SL5
SL5 is a bus rapid transit route on Boston’s MBTA Silver Line that runs between downtown and the Roxbury/Dudley Square area.
 E704243 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: SL5 | Statement: [Silver Line (MBTA), hasRoute, SL5]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: SL5
Context triple: [Silver Line (MBTA), hasRoute, SL5]
  • A. SL1
    SL1 is a Boston bus rapid transit route on the MBTA Silver Line that connects downtown with Logan International Airport.
  • B. SL/R 5000
    The SL/R 5000 is a high-performance V8 sports sedan version of the Holden LX Torana, renowned in Australia for its motorsport heritage and muscle car status.
  • C. SL4
    SL4 is a branch of Boston’s MBTA Silver Line bus rapid transit service that runs between downtown and the Seaport/South Station area.
  • D. SL2
    SL2 is a branch of Boston’s MBTA Silver Line bus rapid transit service that connects South Station with the Seaport and Design Center area.
  • E. SL-3
    SL-3 is the NASA designation for Skylab 3, the second crewed mission to the Skylab space station conducted in 1973.
  • 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: SL5
Triple: [Silver Line (MBTA), hasRoute, SL5]
Generated description
SL5 is a bus rapid transit route on Boston’s MBTA Silver Line that runs between downtown and the Roxbury/Dudley Square area.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: SL5
Target entity description: SL5 is a bus rapid transit route on Boston’s MBTA Silver Line that runs between downtown and the Roxbury/Dudley Square area.
  • A. SL1
    SL1 is a Boston bus rapid transit route on the MBTA Silver Line that connects downtown with Logan International Airport.
  • B. SL/R 5000
    The SL/R 5000 is a high-performance V8 sports sedan version of the Holden LX Torana, renowned in Australia for its motorsport heritage and muscle car status.
  • C. SL4
    SL4 is a branch of Boston’s MBTA Silver Line bus rapid transit service that runs between downtown and the Seaport/South Station area.
  • D. SL2
    SL2 is a branch of Boston’s MBTA Silver Line bus rapid transit service that connects South Station with the Seaport and Design Center area.
  • E. SL-3
    SL-3 is the NASA designation for Skylab 3, the second crewed mission to the Skylab space station conducted in 1973.
  • 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_69ca82aaaf24819084b94d18f699ba53 completed March 30, 2026, 2:03 p.m.
NER Named-entity recognition batch_69cb3cf443e48190ac9e83343ff4019e completed March 31, 2026, 3:18 a.m.
NED1 Entity disambiguation (via context triple) batch_69cbe121b0ac81908b9da58cf14c8df5 completed March 31, 2026, 2:58 p.m.
NEDg Description generation batch_69cbe441b76881909efa791b74316088 completed March 31, 2026, 3:12 p.m.
NED2 Entity disambiguation (via description) batch_69cc34749ae08190a1d30919a0594bfd completed March 31, 2026, 8:54 p.m.
Created at: March 30, 2026, 5:18 p.m.