Triple

T5814382
Position Surface form Disambiguated ID Type / Status
Subject Metra Union Pacific Northwest Line E128947 entity
Predicate lineNumber P1864 FINISHED
Object UP-NW
UP-NW is the abbreviation used by Metra for its Union Pacific Northwest commuter rail line serving Chicago and its northwestern suburbs.
 E549093 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: UP-NW | Statement: [Metra Union Pacific Northwest Line, lineNumber, UP-NW]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: UP-NW
Context triple: [Metra Union Pacific Northwest Line, lineNumber, UP-NW]
  • A. UP-W
    UP-W is the service designation used by Metra for its Union Pacific West commuter rail line in the Chicago metropolitan area.
  • B. NW3
    NW3 is a North West London postcode district covering affluent areas such as Hampstead and Belsize Park.
  • C. NW4
    NW4 is a northwest London postal district covering Hendon and its surrounding areas.
  • D. N.W.
    N.W. is the standard legal citation abbreviation for the North Western Reporter, a regional case law reporter covering appellate decisions from several Midwestern U.S. states.
  • E. UP 200
    UP 200 is a prominent mid-distance sled dog race held annually in Michigan’s Upper Peninsula, attracting mushers and teams from across North America.
  • 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: UP-NW
Triple: [Metra Union Pacific Northwest Line, lineNumber, UP-NW]
Generated description
UP-NW is the abbreviation used by Metra for its Union Pacific Northwest commuter rail line serving Chicago and its northwestern suburbs.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: UP-NW
Target entity description: UP-NW is the abbreviation used by Metra for its Union Pacific Northwest commuter rail line serving Chicago and its northwestern suburbs.
  • A. UP-W
    UP-W is the service designation used by Metra for its Union Pacific West commuter rail line in the Chicago metropolitan area.
  • B. NW3
    NW3 is a North West London postcode district covering affluent areas such as Hampstead and Belsize Park.
  • C. NW4
    NW4 is a northwest London postal district covering Hendon and its surrounding areas.
  • D. N.W.
    N.W. is the standard legal citation abbreviation for the North Western Reporter, a regional case law reporter covering appellate decisions from several Midwestern U.S. states.
  • E. UP 200
    UP 200 is a prominent mid-distance sled dog race held annually in Michigan’s Upper Peninsula, attracting mushers and teams from across North America.
  • 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_69c0084788848190bcf71f6bc5d71597 completed March 22, 2026, 3:18 p.m.
NER Named-entity recognition batch_69c03361c79081908baf872821e79983 completed March 22, 2026, 6:22 p.m.
NED1 Entity disambiguation (via context triple) batch_69c0984c5f14819096dfabce4a83e332 completed March 23, 2026, 1:33 a.m.
NEDg Description generation batch_69c098d889e08190adbd12504a7f3fa1 completed March 23, 2026, 1:35 a.m.
NED2 Entity disambiguation (via description) batch_69c09990da18819099fdc8f25f2ddef2 completed March 23, 2026, 1:38 a.m.
Created at: March 22, 2026, 3:53 p.m.