Triple

T12059984
Position Surface form Disambiguated ID Type / Status
Subject Baltimore rail network E287140 entity
Predicate hasStructure P35 FINISHED
Object Union Tunnel (Baltimore)
Union Tunnel in Baltimore is a historic railroad tunnel that carries passenger and freight trains beneath the city as part of the Northeast Corridor.
 E973029 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: Union Tunnel (Baltimore) | Statement: [Baltimore rail network, hasStructure, Union Tunnel (Baltimore)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Union Tunnel (Baltimore)
Context triple: [Baltimore rail network, hasStructure, Union Tunnel (Baltimore)]
  • A. Baltimore and Potomac Tunnel
    The Baltimore and Potomac Tunnel is a 19th-century railroad tunnel in Baltimore, Maryland, that serves as a critical but aging bottleneck on the Northeast Corridor rail line.
  • B. Fort McHenry Tunnel
    The Fort McHenry Tunnel is a major underwater highway tunnel in Baltimore, Maryland, carrying Interstate 95 beneath the harbor near Fort McHenry to ease traffic through the city.
  • C. Baltimore Harbor Tunnel
    The Baltimore Harbor Tunnel is a vehicular tunnel in Baltimore, Maryland, that carries Interstate 895 beneath the harbor as a major route for traffic bypassing downtown.
  • D. Howard Street Tunnel
    The Howard Street Tunnel is a historic railroad tunnel in Baltimore, Maryland, that carries freight trains beneath the city’s downtown.
  • E. Potomac River tunnel
    The Potomac River tunnel is an underwater rail tunnel in the Washington, D.C. area that carries Washington Metro trains beneath the Potomac River.
  • 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: Union Tunnel (Baltimore)
Triple: [Baltimore rail network, hasStructure, Union Tunnel (Baltimore)]
Generated description
Union Tunnel in Baltimore is a historic railroad tunnel that carries passenger and freight trains beneath the city as part of the Northeast Corridor.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Union Tunnel (Baltimore)
Target entity description: Union Tunnel in Baltimore is a historic railroad tunnel that carries passenger and freight trains beneath the city as part of the Northeast Corridor.
  • A. Baltimore and Potomac Tunnel
    The Baltimore and Potomac Tunnel is a 19th-century railroad tunnel in Baltimore, Maryland, that serves as a critical but aging bottleneck on the Northeast Corridor rail line.
  • B. Fort McHenry Tunnel
    The Fort McHenry Tunnel is a major underwater highway tunnel in Baltimore, Maryland, carrying Interstate 95 beneath the harbor near Fort McHenry to ease traffic through the city.
  • C. Baltimore Harbor Tunnel
    The Baltimore Harbor Tunnel is a vehicular tunnel in Baltimore, Maryland, that carries Interstate 895 beneath the harbor as a major route for traffic bypassing downtown.
  • D. Howard Street Tunnel
    The Howard Street Tunnel is a historic railroad tunnel in Baltimore, Maryland, that carries freight trains beneath the city’s downtown.
  • E. Potomac River tunnel
    The Potomac River tunnel is an underwater rail tunnel in the Washington, D.C. area that carries Washington Metro trains beneath the Potomac River.
  • 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_69d6ab4780948190bdb9f7620c2ac27e completed April 8, 2026, 7:23 p.m.
NER Named-entity recognition batch_69d9043dbccc8190bf9da181f826f0d8 completed April 10, 2026, 2:07 p.m.
NED1 Entity disambiguation (via context triple) batch_69f61e3ee53c81909c2e4620a12a46da completed May 2, 2026, 3:54 p.m.
NEDg Description generation batch_69f61f0dc1e08190bfd2452287d534c9 completed May 2, 2026, 3:58 p.m.
NED2 Entity disambiguation (via description) batch_69f61fa2073881909f683966772bd6b2 completed May 2, 2026, 4 p.m.
Created at: April 8, 2026, 9:47 p.m.