Triple

T3705452
Position Surface form Disambiguated ID Type / Status
Subject Mattapan High-Speed Line E80880 entity
Predicate hasBridge P386 FINISHED
Object Cedar Grove Cemetery bridge
Cedar Grove Cemetery bridge is a historic railway bridge in Boston, Massachusetts, carrying the Mattapan High-Speed Line past Cedar Grove Cemetery along the Neponset River.
E383071 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: Cedar Grove Cemetery bridge | Statement: [Mattapan High-Speed Line, hasBridge, Cedar Grove Cemetery bridge]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Cedar Grove Cemetery bridge
Context triple: [Mattapan High-Speed Line, hasBridge, Cedar Grove Cemetery bridge]
  • A. Wells Street Bridge
    Wells Street Bridge is a historic double-deck, double-leaf bascule bridge in downtown Chicago that carries both road traffic and elevated trains across the Chicago River.
  • B. Kinzie Street Railroad Bridge
    The Kinzie Street Railroad Bridge is a historic, early 20th-century vertical-lift railroad bridge in downtown Chicago, notable as one of the city’s iconic industrial-era river crossings.
  • C. Elm Street viaduct
    Elm Street viaduct is a roadway bridge in downtown Dallas, Texas, that carries Elm Street over the railroad tracks and adjacent areas near Dealey Plaza.
  • D. Hathaway Bridge
    Hathaway Bridge is a major vehicular bridge in Bay County, Florida, carrying traffic across St. Andrew Bay as part of a key Gulf Coast transportation route.
  • E. Church Street Bridge
    Church Street Bridge is a historic road bridge in Melbourne, Australia, known for carrying Church Street over the Yarra River and serving as a key local traffic link.
  • 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: Cedar Grove Cemetery bridge
Triple: [Mattapan High-Speed Line, hasBridge, Cedar Grove Cemetery bridge]
Generated description
Cedar Grove Cemetery bridge is a historic railway bridge in Boston, Massachusetts, carrying the Mattapan High-Speed Line past Cedar Grove Cemetery along the Neponset River.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Cedar Grove Cemetery bridge
Target entity description: Cedar Grove Cemetery bridge is a historic railway bridge in Boston, Massachusetts, carrying the Mattapan High-Speed Line past Cedar Grove Cemetery along the Neponset River.
  • A. Wells Street Bridge
    Wells Street Bridge is a historic double-deck, double-leaf bascule bridge in downtown Chicago that carries both road traffic and elevated trains across the Chicago River.
  • B. Kinzie Street Railroad Bridge
    The Kinzie Street Railroad Bridge is a historic, early 20th-century vertical-lift railroad bridge in downtown Chicago, notable as one of the city’s iconic industrial-era river crossings.
  • C. Elm Street viaduct
    Elm Street viaduct is a roadway bridge in downtown Dallas, Texas, that carries Elm Street over the railroad tracks and adjacent areas near Dealey Plaza.
  • D. Hathaway Bridge
    Hathaway Bridge is a major vehicular bridge in Bay County, Florida, carrying traffic across St. Andrew Bay as part of a key Gulf Coast transportation route.
  • E. Church Street Bridge
    Church Street Bridge is a historic road bridge in Melbourne, Australia, known for carrying Church Street over the Yarra River and serving as a key local traffic link.
  • 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_69ad8b1793888190a5f70e4b21dc05a1 completed March 8, 2026, 2:43 p.m.
NER Named-entity recognition batch_69adc54bbfcc8190bec9c16e3749c3b1 completed March 8, 2026, 6:51 p.m.
NED1 Entity disambiguation (via context triple) batch_69b4cdfada708190ba6ae04bad52bb2b completed March 14, 2026, 2:54 a.m.
NEDg Description generation batch_69b4d2be3be4819082c9627099b78e32 completed March 14, 2026, 3:15 a.m.
NED2 Entity disambiguation (via description) batch_69b4d395336881908a942dd408560a81 completed March 14, 2026, 3:18 a.m.
Created at: March 8, 2026, 3:33 p.m.