Triple

T8402418
Position Surface form Disambiguated ID Type / Status
Subject Green Line B branch E198404 entity
Predicate lineColorFamily P8222 FINISHED
Object Green Line
The Green Line is a light rail service of the Massachusetts Bay Transportation Authority (MBTA) in Boston, known for its multiple lettered branches serving the city and nearby suburbs.
 E46364 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: Green Line | Statement: [Green Line B branch, lineColorFamily, Green Line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Green Line
Context triple: [Green Line B branch, lineColorFamily, Green Line]
  • A. Green Line
    The Green Line is one of the main rapid transit routes of the Dubai Metro, serving key districts along Dubai Creek and connecting important commercial and residential areas.
  • B. Green Line
    Green Line is a hybrid-oriented trim level of the Saturn Aura midsize sedan designed to offer improved fuel efficiency and lower emissions.
  • C. Green Line
    The Green Line is one of the main rapid transit corridors of the Chennai Metro system in Chennai, India, connecting key areas of the city via elevated and underground stations.
  • D. Green Line
    The Green Line is one of the light rail routes in Houston’s METRORail system, serving the city’s East End and connecting it to downtown.
  • E. Green Line
    The Green Line is one of the color-coded rapid transit routes in the Washington Metro system, serving key neighborhoods in Washington, D.C. and parts of Maryland.
  • 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: Green Line
Triple: [Green Line B branch, lineColorFamily, Green Line]
Generated description
The Green Line is a light rail service of the Massachusetts Bay Transportation Authority (MBTA) in Boston, known for its multiple lettered branches serving the city and nearby suburbs.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Green Line
Target entity description: The Green Line is a light rail service of the Massachusetts Bay Transportation Authority (MBTA) in Boston, known for its multiple lettered branches serving the city and nearby suburbs.
  • A. Green Line chosen
    The Green Line is a light rail service in the Boston metropolitan area operated by the Massachusetts Bay Transportation Authority (MBTA), known for serving key downtown and surrounding neighborhoods.
  • B. Green Line
    The Green Line is a light rail service route within the San Diego Trolley system that connects key destinations across the San Diego metropolitan area.
  • C. Green Line
    The Green Line is a light rail service within Salt Lake City's TRAX system that connects key destinations across the metropolitan area.
  • D. Green Line
    The Green Line is a light rail service operated by Sacramento Regional Transit that connects key areas within the Sacramento metropolitan region.
  • E. Green Line
    The Green Line is a light rail and subway–surface transit line in Philadelphia operated by SEPTA, serving multiple routes that run through Center City and into West Philadelphia.
  • F. None of above.

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_69ca8310df9c8190b25f16161cca3e41 completed March 30, 2026, 2:05 p.m.
NER Named-entity recognition batch_69cb824efa5c81908ce816cdb8e1fcfb completed March 31, 2026, 8:14 a.m.
NED1 Entity disambiguation (via context triple) batch_69cea813e384819090a8a7dc05e41ab2 completed April 2, 2026, 5:32 p.m.
NEDg Description generation batch_69cea994f0ac819092fb34a0f2357611 completed April 2, 2026, 5:38 p.m.
NED2 Entity disambiguation (via description) batch_69ceaa4c7ba08190be86cccc3a857656 completed April 2, 2026, 5:41 p.m.
Created at: March 30, 2026, 6:04 p.m.