Triple

T22963894
Position Surface form Disambiguated ID Type / Status
Subject MBTA Commuter Rail at South Station E570980 entity
Predicate terminusFor P388 FINISHED
Object South Coast Rail service
South Coast Rail service is a planned Massachusetts Bay Transportation Authority commuter rail extension that will connect Boston to the South Coast cities of New Bedford and Fall River.
E1563147 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: South Coast Rail service | Statement: [MBTA Commuter Rail at South Station, terminusFor, South Coast Rail service]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: South Coast Rail service
Context triple: [MBTA Commuter Rail at South Station, terminusFor, South Coast Rail service]
  • A. South Coast Line
    The South Coast Line is a New South Wales passenger rail service that runs south from Sydney through the Illawarra region to coastal centres such as Wollongong and Kiama.
  • B. Gloucester–Newport line
    The Gloucester–Newport line is a major railway route in western England and South Wales that runs along the River Severn, linking Gloucester with Newport and forming part of an important cross-border passenger and freight corridor.
  • C. Franklin Line commuter rail service
    The Franklin Line commuter rail service is a Massachusetts Bay Transportation Authority (MBTA) commuter rail route connecting Boston with southwestern suburbs and towns in Norfolk County.
  • D. MBTA Commuter Rail Providence/Stoughton Line
    The MBTA Commuter Rail Providence/Stoughton Line is a regional rail service connecting Boston with Providence and Stoughton, providing key commuter and intercity transit through southeastern Massachusetts and northern Rhode Island.
  • E. Southampton–Salisbury line
    The Southampton–Salisbury line is a regional railway route in southern England that connects the coastal city of Southampton with the cathedral city of Salisbury, serving intermediate towns such as Romsey.
  • 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: South Coast Rail service
Triple: [MBTA Commuter Rail at South Station, terminusFor, South Coast Rail service]
Generated description
South Coast Rail service is a planned Massachusetts Bay Transportation Authority commuter rail extension that will connect Boston to the South Coast cities of New Bedford and Fall River.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: South Coast Rail service
Target entity description: South Coast Rail service is a planned Massachusetts Bay Transportation Authority commuter rail extension that will connect Boston to the South Coast cities of New Bedford and Fall River.
  • A. South Coast Line
    The South Coast Line is a New South Wales passenger rail service that runs south from Sydney through the Illawarra region to coastal centres such as Wollongong and Kiama.
  • B. Gloucester–Newport line
    The Gloucester–Newport line is a major railway route in western England and South Wales that runs along the River Severn, linking Gloucester with Newport and forming part of an important cross-border passenger and freight corridor.
  • C. Franklin Line commuter rail service
    The Franklin Line commuter rail service is a Massachusetts Bay Transportation Authority (MBTA) commuter rail route connecting Boston with southwestern suburbs and towns in Norfolk County.
  • D. MBTA Commuter Rail Providence/Stoughton Line
    The MBTA Commuter Rail Providence/Stoughton Line is a regional rail service connecting Boston with Providence and Stoughton, providing key commuter and intercity transit through southeastern Massachusetts and northern Rhode Island.
  • E. Southampton–Salisbury line
    The Southampton–Salisbury line is a regional railway route in southern England that connects the coastal city of Southampton with the cathedral city of Salisbury, serving intermediate towns such as Romsey.
  • 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_69e245b212a88190b5259caf51606084 completed April 17, 2026, 2:37 p.m.
NER Named-entity recognition batch_69f181f66fbc8190a4a7b73d17537132 completed April 29, 2026, 3:58 a.m.
NED1 Entity disambiguation (via context triple) batch_6a0bca22caa88190889e965c78477a96 completed May 19, 2026, 2:25 a.m.
NEDg Description generation batch_6a0bcb1904c88190ac32e5709bc95858 completed May 19, 2026, 2:29 a.m.
NED2 Entity disambiguation (via description) batch_6a0bcbb8793881909621b16c9ad51cbb completed May 19, 2026, 2:32 a.m.
Created at: April 17, 2026, 3:47 p.m.