Triple

T1596166
Position Surface form Disambiguated ID Type / Status
Subject MBTA bus route 1 E34286 entity
Predicate usesInfrastructure P6820 FINISHED
Object Harvard bus tunnel
The Harvard bus tunnel is an underground transit facility in Cambridge, Massachusetts, that allows MBTA buses to pass beneath Harvard Square and connect to the Harvard Red Line station.
E181535 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: Harvard bus tunnel | Statement: [MBTA bus route 1, usesInfrastructure, Harvard bus tunnel]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Harvard bus tunnel
Context triple: [MBTA bus route 1, usesInfrastructure, Harvard bus tunnel]
  • A. Harvard Yard
    Harvard Yard is the historic central area of Harvard University’s campus in Cambridge, Massachusetts, known for its iconic brick buildings, freshman dormitories, and academic landmarks.
  • B. Ted Williams Tunnel (Boston)
    The Ted Williams Tunnel in Boston is a major underwater highway tunnel beneath Boston Harbor that forms part of the city's Central Artery/Tunnel Project, commonly known as the Big Dig.
  • C. South Boston Transitway
    The South Boston Transitway is an underground bus rapid transit tunnel in Boston that carries MBTA Silver Line routes between South Station and the Seaport District.
  • D. Harvard Square
    Harvard Square is a historic commercial and cultural center in Cambridge, Massachusetts, known for its vibrant mix of shops, restaurants, street performers, and its proximity to Harvard University.
  • E. Harvard Bridge
    Harvard Bridge is a long roadway bridge in Boston and Cambridge, Massachusetts, best known for carrying Massachusetts Avenue over the Charles River and for its quirky "smoot" length measurement.
  • 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: Harvard bus tunnel
Triple: [MBTA bus route 1, usesInfrastructure, Harvard bus tunnel]
Generated description
The Harvard bus tunnel is an underground transit facility in Cambridge, Massachusetts, that allows MBTA buses to pass beneath Harvard Square and connect to the Harvard Red Line station.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Harvard bus tunnel
Target entity description: The Harvard bus tunnel is an underground transit facility in Cambridge, Massachusetts, that allows MBTA buses to pass beneath Harvard Square and connect to the Harvard Red Line station.
  • A. Harvard Yard
    Harvard Yard is the historic central area of Harvard University’s campus in Cambridge, Massachusetts, known for its iconic brick buildings, freshman dormitories, and academic landmarks.
  • B. Ted Williams Tunnel (Boston)
    The Ted Williams Tunnel in Boston is a major underwater highway tunnel beneath Boston Harbor that forms part of the city's Central Artery/Tunnel Project, commonly known as the Big Dig.
  • C. South Boston Transitway
    The South Boston Transitway is an underground bus rapid transit tunnel in Boston that carries MBTA Silver Line routes between South Station and the Seaport District.
  • D. Harvard Square
    Harvard Square is a historic commercial and cultural center in Cambridge, Massachusetts, known for its vibrant mix of shops, restaurants, street performers, and its proximity to Harvard University.
  • E. Harvard Bridge
    Harvard Bridge is a long roadway bridge in Boston and Cambridge, Massachusetts, best known for carrying Massachusetts Avenue over the Charles River and for its quirky "smoot" length measurement.
  • 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_69a885fdcb9c819081ce6f0b8cd477dd completed March 4, 2026, 7:20 p.m.
NER Named-entity recognition batch_69a9092e46748190b27be7d1aba07dff completed March 5, 2026, 4:40 a.m.
NED1 Entity disambiguation (via context triple) batch_69ad46a848ec819085c82be8eaea2044 completed March 8, 2026, 9:51 a.m.
NEDg Description generation batch_69ad4841d278819085507528faeaae3e completed March 8, 2026, 9:58 a.m.
NED2 Entity disambiguation (via description) batch_69ad48ff11d881909fd6e9e40d5f1f38 completed March 8, 2026, 10:01 a.m.
Created at: March 4, 2026, 7:27 p.m.