Triple

T3258255
Position Surface form Disambiguated ID Type / Status
Subject Chennai Metro E68347 entity
Predicate operator P179 FINISHED
Object Chennai Metro Rail Limited
Chennai Metro Rail Limited is the government-owned company responsible for developing, operating, and maintaining the Chennai Metro rapid transit system in Chennai, India.
 E68347 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: Chennai Metro Rail Limited | Statement: [Chennai Metro, operator, Chennai Metro Rail Limited]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Chennai Metro Rail Limited
Context triple: [Chennai Metro, operator, Chennai Metro Rail Limited]
  • A. Chennai Metro
    Chennai Metro is a rapid transit system serving the Indian city of Chennai, providing urban rail connectivity across key residential, commercial, and industrial areas.
  • B. Mumbai Metro One Private Limited
    Mumbai Metro One Private Limited is a special purpose vehicle company responsible for operating and maintaining Mumbai Metro’s Line 1 between Versova and Ghatkopar.
  • C. Chennai Suburban Railway
    Chennai Suburban Railway is a major commuter rail network serving the greater Chennai metropolitan area, providing high-frequency train services that connect the city with its surrounding suburbs.
  • D. Greater Chennai Corporation
    The Greater Chennai Corporation is the civic governing body responsible for municipal administration and urban infrastructure in the city of Chennai, India.
  • E. Chennai railway division
    Chennai railway division is a major administrative division of Indian Railways responsible for operating and managing railway services in and around the Chennai region.
  • 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: Chennai Metro Rail Limited
Triple: [Chennai Metro, operator, Chennai Metro Rail Limited]
Generated description
Chennai Metro Rail Limited is the government-owned company responsible for developing, operating, and maintaining the Chennai Metro rapid transit system in Chennai, India.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Chennai Metro Rail Limited
Target entity description: Chennai Metro Rail Limited is the government-owned company responsible for developing, operating, and maintaining the Chennai Metro rapid transit system in Chennai, India.
  • A. Chennai Metro chosen
    Chennai Metro is a rapid transit system serving the Indian city of Chennai, providing urban rail connectivity across key residential, commercial, and industrial areas.
  • B. Mumbai Metro One Private Limited
    Mumbai Metro One Private Limited is a special purpose vehicle company responsible for operating and maintaining Mumbai Metro’s Line 1 between Versova and Ghatkopar.
  • C. Chennai Suburban Railway
    Chennai Suburban Railway is a major commuter rail network serving the greater Chennai metropolitan area, providing high-frequency train services that connect the city with its surrounding suburbs.
  • D. Greater Chennai Corporation
    The Greater Chennai Corporation is the civic governing body responsible for municipal administration and urban infrastructure in the city of Chennai, India.
  • E. Chennai railway division
    Chennai railway division is a major administrative division of Indian Railways responsible for operating and managing railway services in and around the Chennai region.
  • 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_69ad858f74408190bcbd07f967cd7bd0 completed March 8, 2026, 2:19 p.m.
NER Named-entity recognition batch_69adaf6a46448190a7fa0ca83fa096f8 completed March 8, 2026, 5:18 p.m.
NED1 Entity disambiguation (via context triple) batch_69b2e8369b708190aeddf21dd9440d6a completed March 12, 2026, 4:22 p.m.
NEDg Description generation batch_69b2e9c808188190b681557e010ce159 completed March 12, 2026, 4:28 p.m.
NED2 Entity disambiguation (via description) batch_69b2ea5d38808190a11ebcad2c384db7 completed March 12, 2026, 4:31 p.m.
Created at: March 8, 2026, 3:09 p.m.