Triple

T12059983
Position Surface form Disambiguated ID Type / Status
Subject Baltimore rail network E287140 entity
Predicate hasStructure P35 FINISHED
Object Howard Street Tunnel
The Howard Street Tunnel is a historic railroad tunnel in Baltimore, Maryland, that carries freight trains beneath the city’s downtown.
 E969327 NE FINISHED

Named-entity recognition

Before disambiguation, gpt-5-mini classified whether the object phrase is a named entity — the step behind the object's NE type shown above.

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: Howard Street Tunnel | Statement: [Baltimore rail network, hasStructure, Howard Street Tunnel]

Disambiguation candidates (2 decisions)

The exact options the model was shown at each disambiguation step, with the option it chose highlighted — the evidence behind this triple's disambiguated ids.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Howard Street Tunnel
Context triple: [Baltimore rail network, hasStructure, Howard Street Tunnel]
  • A. 53rd Street Tunnel
    The 53rd Street Tunnel is a New York City Subway tunnel under the East River that carries IND Queens Boulevard Line trains between Manhattan and Queens.
  • B. Midtown Tunnel
    The Midtown Tunnel is a vehicular tunnel in the Hampton Roads region that carries traffic beneath the Elizabeth River between Norfolk and Portsmouth, Virginia.
  • C. Center City Tunnel
    Center City Tunnel is an underground rail corridor in downtown Philadelphia that links several major commuter rail lines to create a unified through-running system.
  • D. Downtown Tunnel
    The Downtown Tunnel is a major underwater vehicular tunnel in the Hampton Roads region that carries traffic beneath the Elizabeth River between Norfolk and Portsmouth, Virginia.
  • E. 14th Street Tunnel
    The 14th Street Tunnel is a major New York City subway tunnel that carries the L train beneath the East River between Manhattan and Brooklyn.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Howard Street Tunnel
Target entity description: The Howard Street Tunnel is a historic railroad tunnel in Baltimore, Maryland, that carries freight trains beneath the city’s downtown.
  • A. 53rd Street Tunnel
    The 53rd Street Tunnel is a New York City Subway tunnel under the East River that carries IND Queens Boulevard Line trains between Manhattan and Queens.
  • B. Midtown Tunnel
    The Midtown Tunnel is a vehicular tunnel in the Hampton Roads region that carries traffic beneath the Elizabeth River between Norfolk and Portsmouth, Virginia.
  • C. Center City Tunnel
    Center City Tunnel is an underground rail corridor in downtown Philadelphia that links several major commuter rail lines to create a unified through-running system.
  • D. Downtown Tunnel
    The Downtown Tunnel is a major underwater vehicular tunnel in the Hampton Roads region that carries traffic beneath the Elizabeth River between Norfolk and Portsmouth, Virginia.
  • E. 14th Street Tunnel
    The 14th Street Tunnel is a major New York City subway tunnel that carries the L train beneath the East River between Manhattan and Brooklyn.
  • F. None of above. chosen

How the object was described

The object's one-sentence description was generated by prompting gpt-5.1 with the object name and this triple as context.

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: Howard Street Tunnel
Triple: [Baltimore rail network, hasStructure, Howard Street Tunnel]
Generated description
The Howard Street Tunnel is a historic railroad tunnel in Baltimore, Maryland, that carries freight trains beneath the city’s downtown.

Provenance (5 batches)

Stage Batch ID Job type Status
creating batch_69d6ab4780948190bdb9f7620c2ac27e elicitation completed
NER batch_69d9043dbccc8190bf9da181f826f0d8 ner completed
NED1 batch_69f60a64c8bc8190920c1ed858ea4794 ned_source_triple completed
NED2 batch_69f60cd51d34819099927fee476958ea ned_description completed
NEDg batch_69f60bda16e48190af8abc0aa8ef41f0 nedg completed
Created at: April 8, 2026, 9:47 p.m.