Triple

T1424931
Position Surface form Disambiguated ID Type / Status
Subject Mystic River watershed E30307 entity
Predicate contains P35 FINISHED
Object Mill Brook (Arlington, Massachusetts)
Mill Brook is a small urban stream in Arlington, Massachusetts, that flows through residential and commercial areas before joining the Mystic River system.
 E164556 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: Mill Brook (Arlington, Massachusetts) | Statement: [Mystic River watershed, contains, Mill Brook (Arlington, Massachusetts)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Mill Brook (Arlington, Massachusetts)
Context triple: [Mystic River watershed, contains, Mill Brook (Arlington, Massachusetts)]
  • A. Alewife Brook Reservation
    Alewife Brook Reservation is an urban nature preserve and wetland park in Cambridge, Massachusetts, offering trails, wildlife habitat, and floodplain protection within the Boston metropolitan area.
  • B. Witham
    Witham is a town in the county of Essex, England, known as a residential and commuter community between Chelmsford and Colchester.
  • C. Tibbetts Brook Park
    Tibbetts Brook Park is a large public recreational park in Yonkers, New York, known for its walking trails, water features, and diverse outdoor amenities.
  • D. Blue Hills Reservation
    Blue Hills Reservation is a large state park and conservation area just south of Boston, known for its wooded hills, hiking trails, and scenic views.
  • E. Walden Pond (Lynn)
    Walden Pond (Lynn) is a scenic pond within the Lynn Woods Reservation in Lynn, Massachusetts, known for its natural beauty and recreational use.
  • 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: Mill Brook (Arlington, Massachusetts)
Triple: [Mystic River watershed, contains, Mill Brook (Arlington, Massachusetts)]
Generated description
Mill Brook is a small urban stream in Arlington, Massachusetts, that flows through residential and commercial areas before joining the Mystic River system.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Mill Brook (Arlington, Massachusetts)
Target entity description: Mill Brook is a small urban stream in Arlington, Massachusetts, that flows through residential and commercial areas before joining the Mystic River system.
  • A. Alewife Brook Reservation
    Alewife Brook Reservation is an urban nature preserve and wetland park in Cambridge, Massachusetts, offering trails, wildlife habitat, and floodplain protection within the Boston metropolitan area.
  • B. Witham
    Witham is a town in the county of Essex, England, known as a residential and commuter community between Chelmsford and Colchester.
  • C. Tibbetts Brook Park
    Tibbetts Brook Park is a large public recreational park in Yonkers, New York, known for its walking trails, water features, and diverse outdoor amenities.
  • D. Blue Hills Reservation
    Blue Hills Reservation is a large state park and conservation area just south of Boston, known for its wooded hills, hiking trails, and scenic views.
  • E. Walden Pond (Lynn)
    Walden Pond (Lynn) is a scenic pond within the Lynn Woods Reservation in Lynn, Massachusetts, known for its natural beauty and recreational use.
  • 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_69a498fb823c8190a67ce4c4837e641a completed March 1, 2026, 7:52 p.m.
NER Named-entity recognition batch_69a4c4bd59148190b96f9f585e07aa0d completed March 1, 2026, 10:59 p.m.
NED1 Entity disambiguation (via context triple) batch_69ad01646fd481909fcd92a1cc027fa2 completed March 8, 2026, 4:56 a.m.
NEDg Description generation batch_69ad022095f88190a68f40a56c7e1729 completed March 8, 2026, 4:59 a.m.
NED2 Entity disambiguation (via description) batch_69ad031af0c8819095df7bd413915c14 completed March 8, 2026, 5:03 a.m.
Created at: March 1, 2026, 8 p.m.