Triple

T1964
Position Surface form Disambiguated ID Type / Status
Subject Belmont, Massachusetts E36 entity
Predicate hasCommuterRailStation P105 FINISHED
Object Belmont Center station
Belmont Center station is a Massachusetts Bay Transportation Authority (MBTA) commuter rail stop located in the commercial center of Belmont, Massachusetts.
E461 NE FINISHED

How this triple was built (5 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: Belmont Center station | Statement: [Belmont, Massachusetts, hasCommuterRailStation, Belmont Center station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Belmont Center station
Context triple: [Belmont, Massachusetts, hasCommuterRailStation, Belmont Center station]
  • A. Union Station
    Union Station is a historic Beaux-Arts transportation hub and major intercity rail terminal in Washington, D.C., serving as a gateway to the U.S. capital.
  • B. Waverley station
    Waverley station is a Massachusetts Bay Transportation Authority (MBTA) commuter rail stop in Belmont, Massachusetts, serving the Fitchburg Line.
  • C. Washington Metro
    Washington Metro is the rapid transit system serving the Washington, D.C. metropolitan area, known for its extensive rail network connecting the city with its suburbs in Maryland and Virginia.
  • D. Carnegie
    Carnegie is a Scottish surname most famously associated with industrialist and philanthropist Andrew Carnegie.
  • E. MBTA Fitchburg Line
    The MBTA Fitchburg Line is a commuter rail route in the Greater Boston area that runs between Boston and Fitchburg, serving numerous suburban communities along the way.
  • 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: Belmont Center station
Triple: [Belmont, Massachusetts, hasCommuterRailStation, Belmont Center station]
Generated description
Belmont Center station is a Massachusetts Bay Transportation Authority (MBTA) commuter rail stop located in the commercial center of Belmont, Massachusetts.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Belmont Center station
Target entity description: Belmont Center station is a Massachusetts Bay Transportation Authority (MBTA) commuter rail stop located in the commercial center of Belmont, Massachusetts.
  • A. Union Station
    Union Station is a historic Beaux-Arts transportation hub and major intercity rail terminal in Washington, D.C., serving as a gateway to the U.S. capital.
  • B. Waverley station
    Waverley station is a Massachusetts Bay Transportation Authority (MBTA) commuter rail stop in Belmont, Massachusetts, serving the Fitchburg Line.
  • C. Washington Metro
    Washington Metro is the rapid transit system serving the Washington, D.C. metropolitan area, known for its extensive rail network connecting the city with its suburbs in Maryland and Virginia.
  • D. Carnegie
    Carnegie is a Scottish surname most famously associated with industrialist and philanthropist Andrew Carnegie.
  • E. MBTA Fitchburg Line
    The MBTA Fitchburg Line is a commuter rail route in the Greater Boston area that runs between Boston and Fitchburg, serving numerous suburban communities along the way.
  • F. None of above. chosen
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: hasCommuterRailStation
Context triple: [Belmont, Massachusetts, hasCommuterRailStation, Belmont Center station]
  • A. adjacentToInfrastructure
    Indicates that one entity is located directly next to or in immediate proximity to a piece of infrastructure.
  • B. hasMainCampus
    Indicates that an educational institution is primarily based at or chiefly associated with a particular campus location.
  • C. isMajorCenterOf
    Indicates that a place serves as a primary hub or focal point for a particular activity, function, or domain.
  • D. hasNotableFacility chosen
    Indicates that an entity possesses or hosts a facility that is of particular significance, prominence, or interest.
  • E. hasAreaCode
    Indicates that a specified telephone area code is assigned to or associated with a particular geographic region, location, or phone service entity.
  • F. None of above.

Provenance (6 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_69a22cde80848190b62c5f556b4d62ba completed Feb. 27, 2026, 11:46 p.m.
NER Named-entity recognition batch_69a23344daf8819083118bbac5f46568 completed Feb. 28, 2026, 12:13 a.m.
NED1 Entity disambiguation (via context triple) batch_69a23d860c2881909010e0310acaf10f completed Feb. 28, 2026, 12:57 a.m.
NEDg Description generation batch_69a23ffe6b4081908f9d04b169a7bed8 completed Feb. 28, 2026, 1:08 a.m.
NED2 Entity disambiguation (via description) batch_69a2406bedd081909e8704cef5ab08dd completed Feb. 28, 2026, 1:10 a.m.
PD Predicate disambiguation batch_69a232e52e7c81909c072703e28e8c61 completed Feb. 28, 2026, 12:12 a.m.
Created at: Feb. 27, 2026, 11:48 p.m.