Triple

T1663470
Position Surface form Disambiguated ID Type / Status
Subject Alewife station E35959 entity
Predicate isTerminusFor P388 FINISHED
Object Red Line Alewife branch
The Red Line Alewife branch is a segment of Boston's MBTA Red Line rapid transit system that runs through Cambridge and surrounding areas, terminating at Alewife station.
E213926 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: Red Line Alewife branch | Statement: [Alewife station, isTerminusFor, Red Line Alewife branch]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Red Line Alewife branch
Context triple: [Alewife station, isTerminusFor, Red Line Alewife branch]
  • A. Hudson Line
    The Hudson Line is a major passenger rail route running along the east bank of the Hudson River in New York, serving both commuter and intercity trains between New York City and points upstate.
  • B. Green Line E branch
    The Green Line E branch is a light rail service of Boston's MBTA Green Line that runs from downtown through the Back Bay and Longwood Medical Area to Heath Street in Jamaica Plain.
  • C. Green Line B branch
    The Green Line B branch is a light rail service of Boston's MBTA Green Line that runs along Commonwealth Avenue, primarily serving Boston University and the Allston–Brighton neighborhoods.
  • D. Flushing Line
    The Flushing Line is a New York City Subway service in Queens and Manhattan, best known today as the 7 train running between Flushing–Main Street and Hudson Yards.
  • E. Lenox Avenue Line
    The Lenox Avenue Line is a major New York City Subway route in Harlem, Manhattan, primarily served by IRT trains running beneath Lenox Avenue.
  • 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: Red Line Alewife branch
Triple: [Alewife station, isTerminusFor, Red Line Alewife branch]
Generated description
The Red Line Alewife branch is a segment of Boston's MBTA Red Line rapid transit system that runs through Cambridge and surrounding areas, terminating at Alewife station.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Red Line Alewife branch
Target entity description: The Red Line Alewife branch is a segment of Boston's MBTA Red Line rapid transit system that runs through Cambridge and surrounding areas, terminating at Alewife station.
  • A. Hudson Line
    The Hudson Line is a major passenger rail route running along the east bank of the Hudson River in New York, serving both commuter and intercity trains between New York City and points upstate.
  • B. Green Line E branch
    The Green Line E branch is a light rail service of Boston's MBTA Green Line that runs from downtown through the Back Bay and Longwood Medical Area to Heath Street in Jamaica Plain.
  • C. Green Line B branch
    The Green Line B branch is a light rail service of Boston's MBTA Green Line that runs along Commonwealth Avenue, primarily serving Boston University and the Allston–Brighton neighborhoods.
  • D. Flushing Line
    The Flushing Line is a New York City Subway service in Queens and Manhattan, best known today as the 7 train running between Flushing–Main Street and Hudson Yards.
  • E. Lenox Avenue Line
    The Lenox Avenue Line is a major New York City Subway route in Harlem, Manhattan, primarily served by IRT trains running beneath Lenox Avenue.
  • 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_69a88606aa808190aa0b421b4271f220 completed March 4, 2026, 7:20 p.m.
NER Named-entity recognition batch_69a90ab5d1a08190a3325ff203b573fb completed March 5, 2026, 4:46 a.m.
NED1 Entity disambiguation (via context triple) batch_69adeac637748190b67ddd9eedc3698d completed March 8, 2026, 9:31 p.m.
NEDg Description generation batch_69adeb503ec88190b8d0cb17bbb8f520 completed March 8, 2026, 9:34 p.m.
NED2 Entity disambiguation (via description) batch_69adef13e030819086e9e8862198d859 completed March 8, 2026, 9:50 p.m.
Created at: March 4, 2026, 7:29 p.m.