Triple

T9813341
Position Surface form Disambiguated ID Type / Status
Subject Green Line C Branch E238333 entity
Predicate usesRollingStock P5426 FINISHED
Object Type 8 LRV
The Type 8 LRV is a low-floor light rail vehicle used by Boston’s MBTA on its Green Line, designed to improve accessibility and passenger comfort.
E823269 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: Type 8 LRV | Statement: [Green Line C Branch, usesRollingStock, Type 8 LRV]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Type 8 LRV
Context triple: [Green Line C Branch, usesRollingStock, Type 8 LRV]
  • A. Breda LRV2
    Breda LRV2 is a type of light rail vehicle built by the Italian manufacturer Breda, used in urban tram and light rail systems such as San Francisco’s Muni Metro.
  • B. L-Series wagon
    The L-Series wagon is a compact station wagon variant of Saturn’s L-Series lineup, offering practical cargo space and family-friendly versatility.
  • C. W-series medium-duty platform
    The W-series medium-duty platform is a line of cab-over-engine commercial truck chassis developed by General Motors for use in various medium-duty vocational and delivery applications.
  • D. LAV (leisure activity vehicle)
    The LAV (leisure activity vehicle) is a compact, van-based multi-purpose vehicle designed to combine passenger comfort with flexible cargo space for everyday and recreational use.
  • E. C-12V Huron
    The C-12V Huron is a military transport and liaison aircraft, derived from the Beechcraft King Air series, used for personnel and light cargo transport, medical evacuation, and utility missions.
  • 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: Type 8 LRV
Triple: [Green Line C Branch, usesRollingStock, Type 8 LRV]
Generated description
The Type 8 LRV is a low-floor light rail vehicle used by Boston’s MBTA on its Green Line, designed to improve accessibility and passenger comfort.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Type 8 LRV
Target entity description: The Type 8 LRV is a low-floor light rail vehicle used by Boston’s MBTA on its Green Line, designed to improve accessibility and passenger comfort.
  • A. Breda LRV2
    Breda LRV2 is a type of light rail vehicle built by the Italian manufacturer Breda, used in urban tram and light rail systems such as San Francisco’s Muni Metro.
  • B. L-Series wagon
    The L-Series wagon is a compact station wagon variant of Saturn’s L-Series lineup, offering practical cargo space and family-friendly versatility.
  • C. W-series medium-duty platform
    The W-series medium-duty platform is a line of cab-over-engine commercial truck chassis developed by General Motors for use in various medium-duty vocational and delivery applications.
  • D. LAV (leisure activity vehicle)
    The LAV (leisure activity vehicle) is a compact, van-based multi-purpose vehicle designed to combine passenger comfort with flexible cargo space for everyday and recreational use.
  • E. C-12V Huron
    The C-12V Huron is a military transport and liaison aircraft, derived from the Beechcraft King Air series, used for personnel and light cargo transport, medical evacuation, and utility missions.
  • 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_69ca84defac48190abc1148804f184c1 completed March 30, 2026, 2:12 p.m.
NER Named-entity recognition batch_69cdb22410208190b82b81a4df800f80 completed April 2, 2026, 12:02 a.m.
NED1 Entity disambiguation (via context triple) batch_69d1cc63c450819091e57030a48e7d88 completed April 5, 2026, 2:43 a.m.
NEDg Description generation batch_69d1cce3d9d481909eaf7278dfe20955 completed April 5, 2026, 2:45 a.m.
NED2 Entity disambiguation (via description) batch_69d1cd5d1670819085c58ff8889318af completed April 5, 2026, 2:47 a.m.
Created at: March 30, 2026, 8:30 p.m.