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.