Triple

T23051423
Position Surface form Disambiguated ID Type / Status
Subject Amtrak at South Station E574023 entity
Predicate hubFor P423 FINISHED
Object Northeast Regional Boston services
Northeast Regional Boston services are Amtrak’s intercity passenger train routes that connect Boston’s South Station with major cities along the Northeast Corridor, including New York City and Washington, D.C.
 E1568515 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: Northeast Regional Boston services | Statement: [Amtrak at South Station, hubFor, Northeast Regional Boston services]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Northeast Regional Boston services
Context triple: [Amtrak at South Station, hubFor, Northeast Regional Boston services]
  • A. Monadnock Region public transit services
    Monadnock Region public transit services is a local transportation system providing bus and related transit options to communities in and around Keene, New Hampshire.
  • B. North Side MBTA Commuter Rail
    North Side MBTA Commuter Rail is the group of Boston-area commuter rail lines operated from North Station that serve northern suburbs and cities such as Lowell, Haverhill, and Newburyport/Rockport.
  • C. MBTA paratransit service
    MBTA paratransit service is a door-to-door, shared-ride transportation program providing accessible transit for people with disabilities who are unable to use standard MBTA buses, subways, or trains.
  • D. MBTA Commuter Rail network
    The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
  • E. Fitchburg–Leominster area transit services
    Fitchburg–Leominster area transit services is a regional public transportation provider serving the cities of Fitchburg and Leominster and surrounding communities in north-central Massachusetts.
  • 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: Northeast Regional Boston services
Triple: [Amtrak at South Station, hubFor, Northeast Regional Boston services]
Generated description
Northeast Regional Boston services are Amtrak’s intercity passenger train routes that connect Boston’s South Station with major cities along the Northeast Corridor, including New York City and Washington, D.C.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Northeast Regional Boston services
Target entity description: Northeast Regional Boston services are Amtrak’s intercity passenger train routes that connect Boston’s South Station with major cities along the Northeast Corridor, including New York City and Washington, D.C.
  • A. Monadnock Region public transit services
    Monadnock Region public transit services is a local transportation system providing bus and related transit options to communities in and around Keene, New Hampshire.
  • B. North Side MBTA Commuter Rail
    North Side MBTA Commuter Rail is the group of Boston-area commuter rail lines operated from North Station that serve northern suburbs and cities such as Lowell, Haverhill, and Newburyport/Rockport.
  • C. MBTA paratransit service
    MBTA paratransit service is a door-to-door, shared-ride transportation program providing accessible transit for people with disabilities who are unable to use standard MBTA buses, subways, or trains.
  • D. MBTA Commuter Rail network
    The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
  • E. Fitchburg–Leominster area transit services
    Fitchburg–Leominster area transit services is a regional public transportation provider serving the cities of Fitchburg and Leominster and surrounding communities in north-central Massachusetts.
  • 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_69e245ba7ae48190be606dbc54120e39 completed April 17, 2026, 2:37 p.m.
NER Named-entity recognition batch_69f1867d010c8190bc5dba6758d0b797 completed April 29, 2026, 4:18 a.m.
NED1 Entity disambiguation (via context triple) batch_6a0c0ae036908190a6cdcb74e0d28f82 completed May 19, 2026, 7:01 a.m.
NEDg Description generation batch_6a0c0e2dd7908190afa879304ef3ed17 completed May 19, 2026, 7:15 a.m.
NED2 Entity disambiguation (via description) batch_6a0c0eaa7f8c81908110341d34d92537 completed May 19, 2026, 7:18 a.m.
Created at: April 17, 2026, 3:54 p.m.