Triple

T704613
Position Surface form Disambiguated ID Type / Status
Subject Yellow Line (Washington Metro) E14071 entity
Predicate usesTunnel P18707 FINISHED
Object 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.
E88024 NE FINISHED

How this triple was built (5 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: Potomac River tunnel | Statement: [Yellow Line (Washington Metro), usesTunnel, Potomac River tunnel]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Potomac River tunnel
Context triple: [Yellow Line (Washington Metro), usesTunnel, Potomac River tunnel]
  • A. Malinta Tunnel
    Malinta Tunnel is a historic underground complex on Corregidor Island in the Philippines that served as a bomb-proof headquarters and hospital for American and Filipino forces during World War II.
  • B. Shandaken Tunnel
    The Shandaken Tunnel is an aqueduct in New York State that diverts water from the Schoharie Reservoir to the Esopus Creek as part of the New York City water supply system.
  • C. Geneva Spur
    Geneva Spur is a branch of the Illinois Prairie Path, a multi-use recreational trail in the Chicago metropolitan area.
  • D. Hudson River tunnels
    The Hudson River tunnels are a pair of early 20th-century rail tunnels beneath the Hudson River that carry Amtrak and NJ Transit trains between New Jersey and New York City’s Penn Station.
  • E. Dulles Greenway
    Dulles Greenway is a privately owned toll road in Northern Virginia that connects Washington Dulles International Airport with communities in Loudoun County.
  • 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: Potomac River tunnel
Triple: [Yellow Line (Washington Metro), usesTunnel, Potomac River tunnel]
Generated description
The Potomac River tunnel is an underwater rail tunnel in the Washington, D.C. area that carries Washington Metro trains beneath the Potomac River.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Potomac River tunnel
Target entity description: The Potomac River tunnel is an underwater rail tunnel in the Washington, D.C. area that carries Washington Metro trains beneath the Potomac River.
  • A. Malinta Tunnel
    Malinta Tunnel is a historic underground complex on Corregidor Island in the Philippines that served as a bomb-proof headquarters and hospital for American and Filipino forces during World War II.
  • B. Shandaken Tunnel
    The Shandaken Tunnel is an aqueduct in New York State that diverts water from the Schoharie Reservoir to the Esopus Creek as part of the New York City water supply system.
  • C. Geneva Spur
    Geneva Spur is a branch of the Illinois Prairie Path, a multi-use recreational trail in the Chicago metropolitan area.
  • D. Hudson River tunnels
    The Hudson River tunnels are a pair of early 20th-century rail tunnels beneath the Hudson River that carry Amtrak and NJ Transit trains between New Jersey and New York City’s Penn Station.
  • E. Dulles Greenway
    Dulles Greenway is a privately owned toll road in Northern Virginia that connects Washington Dulles International Airport with communities in Loudoun County.
  • F. None of above. chosen
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: usesTunnel
Context triple: [Yellow Line (Washington Metro), usesTunnel, Potomac River tunnel]
  • A. usesTransport
    Indicates that an entity employs or relies on a particular mode or means of transportation to move from one place to another.
  • B. hasTunnelLengthApprox
    Indicates that an entity has a tunnel whose length is approximately a specified value.
  • C. hasTrench
    Indicates that one entity possesses, contains, or is characterized by a trench associated with it.
  • D. servesAsGatewayTo
    Indicates that one entity functions as an entry point, access route, or intermediary channel that enables reaching or connecting to another entity.
  • E. tunnelCircumference
    Indicates the circular distance around the inner boundary of a tunnel’s cross-section.
  • F. None of above. chosen

Provenance (7 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_69a493494ec48190ae6751683625a9ba completed March 1, 2026, 7:28 p.m.
NER Named-entity recognition batch_69a4a58d4c3c8190ad4527d14bca5e6e completed March 1, 2026, 8:46 p.m.
NED1 Entity disambiguation (via context triple) batch_69a64a5618348190b8ec2c7d6bd06e2b completed March 3, 2026, 2:41 a.m.
NEDg Description generation batch_69a64ab831308190923f1e95b9311c5a completed March 3, 2026, 2:43 a.m.
NED2 Entity disambiguation (via description) batch_69a64b1ff9548190bcffcc04f2365aaa completed March 3, 2026, 2:44 a.m.
PD Predicate disambiguation batch_69a4a4edc33881909a978268f6dd5d82 completed March 1, 2026, 8:43 p.m.
PDg Predicate description generation batch_69a4a58c0a84819094f07658dc651b36 completed March 1, 2026, 8:46 p.m.
Created at: March 1, 2026, 7:36 p.m.