Triple

T3211670
Position Surface form Disambiguated ID Type / Status
Subject Chennai Central railway station E67294 entity
Predicate division P889 FINISHED
Object 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.
 E337978 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 railway division | Statement: [Chennai Central railway station, division, Chennai railway division]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Chennai railway division
Context triple: [Chennai Central railway station, division, Chennai railway division]
  • A. Vijayawada railway division
    Vijayawada railway division is a major administrative division of Indian Railways under the South Central Railway zone, overseeing railway operations and infrastructure in and around Vijayawada, Andhra Pradesh.
  • B. Chennai Central railway station
    Chennai Central railway station is a major historic railway terminus and one of the busiest transport hubs in South India, serving as a key gateway to the city of Chennai and beyond.
  • C. Tiruchirappalli Junction railway station
    Tiruchirappalli Junction railway station is a major railway hub in Tamil Nadu, India, serving as one of the busiest and most important junctions in the Southern Railway zone.
  • D. Chennai Egmore railway station
    Chennai Egmore railway station is one of the major railway terminals in Chennai, India, serving as a key hub for regional and long-distance trains, especially to southern Tamil Nadu.
  • E. Coimbatore North Junction
    Coimbatore North Junction is a railway station in Coimbatore, Tamil Nadu, serving as a secondary rail hub that connects the city to various regional and long-distance routes.
  • 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 railway division
Triple: [Chennai Central railway station, division, Chennai railway division]
Generated description
Chennai railway division is a major administrative division of Indian Railways responsible for operating and managing railway services in and around the Chennai region.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Chennai railway division
Target entity description: Chennai railway division is a major administrative division of Indian Railways responsible for operating and managing railway services in and around the Chennai region.
  • A. Vijayawada railway division
    Vijayawada railway division is a major administrative division of Indian Railways under the South Central Railway zone, overseeing railway operations and infrastructure in and around Vijayawada, Andhra Pradesh.
  • B. Chennai Central railway station
    Chennai Central railway station is a major historic railway terminus and one of the busiest transport hubs in South India, serving as a key gateway to the city of Chennai and beyond.
  • C. Tiruchirappalli Junction railway station
    Tiruchirappalli Junction railway station is a major railway hub in Tamil Nadu, India, serving as one of the busiest and most important junctions in the Southern Railway zone.
  • D. Chennai Egmore railway station
    Chennai Egmore railway station is one of the major railway terminals in Chennai, India, serving as a key hub for regional and long-distance trains, especially to southern Tamil Nadu.
  • E. Coimbatore North Junction
    Coimbatore North Junction is a railway station in Coimbatore, Tamil Nadu, serving as a secondary rail hub that connects the city to various regional and long-distance routes.
  • 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_69ad858ac36c81909962589cd277d6e2 completed March 8, 2026, 2:19 p.m.
NER Named-entity recognition batch_69adaaba224c8190ad2f4e0ed1c2ca4a completed March 8, 2026, 4:58 p.m.
NED1 Entity disambiguation (via context triple) batch_69b262326d508190a4a702ed549fed99 completed March 12, 2026, 6:50 a.m.
NEDg Description generation batch_69b264c446088190a1651e108279c7ba completed March 12, 2026, 7:01 a.m.
NED2 Entity disambiguation (via description) batch_69b265ef74d081908fe4dd4998dbf240 completed March 12, 2026, 7:06 a.m.
Created at: March 8, 2026, 3:07 p.m.