Triple

T15878742
Position Surface form Disambiguated ID Type / Status
Subject Green Line Medford/Tufts branch E385017 entity
Predicate hasStation P35 FINISHED
Object East Somerville station
East Somerville station is an MBTA Green Line light rail stop in Somerville, Massachusetts, serving the Medford/Tufts branch extension into the city.
 E1186490 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: East Somerville station | Statement: [Green Line Medford/Tufts branch, hasStation, East Somerville station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: East Somerville station
Context triple: [Green Line Medford/Tufts branch, hasStation, East Somerville station]
  • A. Union Square station (Somerville)
    Union Square station (Somerville) is an MBTA Green Line light rail station in Somerville, Massachusetts, serving as the line’s northern terminus and a key part of the Green Line Extension project.
  • B. Malden Center station
    Malden Center station is a major transit hub in Malden, Massachusetts, serving both MBTA Orange Line subway and commuter rail services.
  • C. Roxbury Crossing station
    Roxbury Crossing station is an MBTA Orange Line rapid transit stop in Boston, Massachusetts, serving the Mission Hill neighborhood and surrounding areas.
  • D. Beverly Farms station
    Beverly Farms station is a commuter rail stop in the Beverly Farms neighborhood of Beverly, Massachusetts, served by the MBTA's Newburyport/Rockport Line.
  • E. Medford/Tufts station
    Medford/Tufts station is a Massachusetts Bay Transportation Authority light rail station in Medford serving Tufts University and the surrounding area.
  • 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: East Somerville station
Triple: [Green Line Medford/Tufts branch, hasStation, East Somerville station]
Generated description
East Somerville station is an MBTA Green Line light rail stop in Somerville, Massachusetts, serving the Medford/Tufts branch extension into the city.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: East Somerville station
Target entity description: East Somerville station is an MBTA Green Line light rail stop in Somerville, Massachusetts, serving the Medford/Tufts branch extension into the city.
  • A. Union Square station (Somerville)
    Union Square station (Somerville) is an MBTA Green Line light rail station in Somerville, Massachusetts, serving as the line’s northern terminus and a key part of the Green Line Extension project.
  • B. Malden Center station
    Malden Center station is a major transit hub in Malden, Massachusetts, serving both MBTA Orange Line subway and commuter rail services.
  • C. Roxbury Crossing station
    Roxbury Crossing station is an MBTA Orange Line rapid transit stop in Boston, Massachusetts, serving the Mission Hill neighborhood and surrounding areas.
  • D. Beverly Farms station
    Beverly Farms station is a commuter rail stop in the Beverly Farms neighborhood of Beverly, Massachusetts, served by the MBTA's Newburyport/Rockport Line.
  • E. Medford/Tufts station
    Medford/Tufts station is a Massachusetts Bay Transportation Authority light rail station in Medford serving Tufts University and the surrounding area.
  • 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_69d86da4e86481909f1325fdc971b5ec completed April 10, 2026, 3:25 a.m.
NER Named-entity recognition batch_69e155ff96588190b8fca1c3bf4a39a2 completed April 16, 2026, 9:34 p.m.
NED1 Entity disambiguation (via context triple) batch_69ffbe6ae10081909a7d8be8cbb3aed2 completed May 9, 2026, 11:08 p.m.
NEDg Description generation batch_69ffbefd91208190809da95995554152 completed May 9, 2026, 11:10 p.m.
NED2 Entity disambiguation (via description) batch_69ffbf745f788190abae3ba723c3a564 completed May 9, 2026, 11:12 p.m.
Created at: April 10, 2026, 4:51 a.m.