Triple

T7366
Position Surface form Disambiguated ID Type / Status
Subject Waverley station E146 entity
Predicate partOfSystem P840 FINISHED
Object MBTA Commuter Rail
MBTA Commuter Rail is a regional rail network serving Greater Boston and surrounding communities, providing commuter train service to and from downtown Boston.
E2866 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: MBTA Commuter Rail | Statement: [Waverley station, partOfSystem, MBTA Commuter Rail]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: MBTA Commuter Rail
Context triple: [Waverley station, partOfSystem, MBTA Commuter Rail]
  • A. MBTA
    The MBTA (Massachusetts Bay Transportation Authority) is the public transit agency that operates subway, bus, commuter rail, and ferry services in the Greater Boston area.
  • B. 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.
  • C. MBTA Red Line
    The MBTA Red Line is a major rapid transit line in the Boston metropolitan area that runs through key communities including Cambridge, connecting them to downtown Boston and other parts of the region.
  • D. MBTA bus network
    The MBTA bus network is the system of public bus routes serving Cambridge and the greater Boston area as part of the Massachusetts Bay Transportation Authority’s regional transit services.
  • E. Amtrak Empire Corridor
    The Amtrak Empire Corridor is a major passenger rail route in New York State that connects New York City with Albany and other upstate cities along the Hudson River and beyond.
  • 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: MBTA Commuter Rail
Triple: [Waverley station, partOfSystem, MBTA Commuter Rail]
Generated description
MBTA Commuter Rail is a regional rail network serving Greater Boston and surrounding communities, providing commuter train service to and from downtown Boston.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: MBTA Commuter Rail
Target entity description: MBTA Commuter Rail is a regional rail network serving Greater Boston and surrounding communities, providing commuter train service to and from downtown Boston.
  • A. MBTA chosen
    The MBTA (Massachusetts Bay Transportation Authority) is the public transit agency that operates subway, bus, commuter rail, and ferry services in the Greater Boston area.
  • B. 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.
  • C. MBTA Red Line
    The MBTA Red Line is a major rapid transit line in the Boston metropolitan area that runs through key communities including Cambridge, connecting them to downtown Boston and other parts of the region.
  • D. MBTA bus network
    The MBTA bus network is the system of public bus routes serving Cambridge and the greater Boston area as part of the Massachusetts Bay Transportation Authority’s regional transit services.
  • E. Amtrak Empire Corridor
    The Amtrak Empire Corridor is a major passenger rail route in New York State that connects New York City with Albany and other upstate cities along the Hudson River and beyond.
  • F. None of above.
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: partOfSystem
Context triple: [Waverley station, partOfSystem, MBTA Commuter Rail]
  • A. hasPart
    Indicates that one entity is a component, segment, or constituent part of another entity.
  • B. operatesBy
    Indicates that an entity performs its function, action, or process through the use or application of another entity (e.g., a method, mechanism, or principle).
  • C. plannedFacility
    Indicates that a facility is intended or scheduled to be built, established, or implemented in the future but does not yet exist or operate.
  • D. staffIncluded
    Indicates that staff members are included or provided as part of the associated entity, service, or arrangement.
  • E. worksWith
    Indicates that two entities collaborate or perform tasks together in a shared work-related context.
  • F. None of above. chosen

Provenance (7 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_69a23bb612708190b09f25385e4b63d1 completed Feb. 28, 2026, 12:49 a.m.
NER Named-entity recognition batch_69a241a55ac081909e95b71c97db8140 completed Feb. 28, 2026, 1:15 a.m.
NED1 Entity disambiguation (via context triple) batch_69a2a3cd69288190b2321a4478699c56 completed Feb. 28, 2026, 8:14 a.m.
NEDg Description generation batch_69a2a5e6e260819085b4de29c3234b54 completed Feb. 28, 2026, 8:23 a.m.
NED2 Entity disambiguation (via description) batch_69a2a65e32e881908e743380f8868cc0 completed Feb. 28, 2026, 8:25 a.m.
PD Predicate disambiguation batch_69a23fe1cf38819080ea56c40bf2632e completed Feb. 28, 2026, 1:07 a.m.
PDg Predicate description generation batch_69a241a4a0f481908de66b64c6262fcd completed Feb. 28, 2026, 1:15 a.m.
Created at: Feb. 28, 2026, 12:54 a.m.