Triple

T4177091
Position Surface form Disambiguated ID Type / Status
Subject Houston METRORail E86502 entity
Predicate expansionPhase P50445 FINISHED
Object North Line extension of Red Line
The North Line extension of the Red Line is a METRORail light rail expansion in Houston that extends service north from downtown to additional neighborhoods and transit connections.
E416833 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: North Line extension of Red Line | Statement: [Houston METRORail, expansionPhase, North Line extension of Red Line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: North Line extension of Red Line
Context triple: [Houston METRORail, expansionPhase, North Line extension of Red Line]
  • A. Red Line Northwest Extension corridor
    The Red Line Northwest Extension corridor is a planned expansion route of Boston's MBTA Red Line intended to extend rapid transit service northwest from its current terminus.
  • B. Green Line southern extension
    The Green Line southern extension is a Washington Metro expansion project that extended the Green Line further into the suburbs of Prince George's County, Maryland, adding several new stations beyond its previous terminus.
  • C. Green Line Extension
    The Green Line Extension is a Massachusetts Bay Transportation Authority light rail project that extends Boston’s Green Line service into previously unserved neighborhoods in Somerville and Medford.
  • D. Purple Line Express
    Purple Line Express is a rush-hour rapid transit service of the Chicago Transit Authority that operates as a faster, limited-stop variant of the Purple Line.
  • E. Metra Electric District line
    The Metra Electric District line is a commuter rail line in the Chicago metropolitan area that runs from downtown Chicago to its southern suburbs, serving key destinations along the South Side and beyond.
  • 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: North Line extension of Red Line
Triple: [Houston METRORail, expansionPhase, North Line extension of Red Line]
Generated description
The North Line extension of the Red Line is a METRORail light rail expansion in Houston that extends service north from downtown to additional neighborhoods and transit connections.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: North Line extension of Red Line
Target entity description: The North Line extension of the Red Line is a METRORail light rail expansion in Houston that extends service north from downtown to additional neighborhoods and transit connections.
  • A. Red Line Northwest Extension corridor
    The Red Line Northwest Extension corridor is a planned expansion route of Boston's MBTA Red Line intended to extend rapid transit service northwest from its current terminus.
  • B. Green Line southern extension
    The Green Line southern extension is a Washington Metro expansion project that extended the Green Line further into the suburbs of Prince George's County, Maryland, adding several new stations beyond its previous terminus.
  • C. Green Line Extension
    The Green Line Extension is a Massachusetts Bay Transportation Authority light rail project that extends Boston’s Green Line service into previously unserved neighborhoods in Somerville and Medford.
  • D. Purple Line Express
    Purple Line Express is a rush-hour rapid transit service of the Chicago Transit Authority that operates as a faster, limited-stop variant of the Purple Line.
  • E. Metra Electric District line
    The Metra Electric District line is a commuter rail line in the Chicago metropolitan area that runs from downtown Chicago to its southern suburbs, serving key destinations along the South Side and beyond.
  • F. None of above. chosen
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: expansionPhase
Context triple: [Houston METRORail, expansionPhase, North Line extension of Red Line]
  • A. expansionProject chosen
    Indicates a project whose primary purpose is to enlarge, extend, or increase the capacity, scope, or reach of something.
  • B. expansionStatus
    Indicates the current state or phase of growth, enlargement, or extension of something relative to its previous or intended size or scope.
  • C. expansionType
    Indicates the specific manner or category by which something grows, extends, or increases in scope or size.
  • D. expands
    Indicates that one entity increases in size, volume, scope, or extent relative to a previous state or another entity.
  • E. expandsIn
    Indicates that one entity grows, spreads, or extends its presence or influence within the space, scope, or context defined by another entity.
  • F. None of above.

Provenance (6 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_69aed93de98c8190ad838ce507b77c8a completed March 9, 2026, 2:29 p.m.
NER Named-entity recognition batch_69af07078cb081909f64326b12522410 completed March 9, 2026, 5:44 p.m.
NED1 Entity disambiguation (via context triple) batch_69b57f57509881909d0353a48d868f5d completed March 14, 2026, 3:31 p.m.
NEDg Description generation batch_69b57fbb037481908b2891e3af32e6e5 completed March 14, 2026, 3:33 p.m.
NED2 Entity disambiguation (via description) batch_69b58016777c8190a3e73ab96907e3a3 completed March 14, 2026, 3:34 p.m.
PD Predicate disambiguation batch_69af019155448190b19868583272513f completed March 9, 2026, 5:21 p.m.
Created at: March 9, 2026, 3:45 p.m.