Triple

T13036615
Position Surface form Disambiguated ID Type / Status
Subject Southern Railway zone E326576 entity
Predicate notableRoute P22 FINISHED
Object Chennai–Thiruvananthapuram line
The Chennai–Thiruvananthapuram line is a major Indian Railways route in South India that connects Tamil Nadu’s capital Chennai with Kerala’s capital Thiruvananthapuram, serving numerous important cities and towns along the way.
E1020694 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–Thiruvananthapuram line | Statement: [Southern Railway zone, notableRoute, Chennai–Thiruvananthapuram line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Chennai–Thiruvananthapuram line
Context triple: [Southern Railway zone, notableRoute, Chennai–Thiruvananthapuram line]
  • A. Chennai–Tiruchirappalli line
    The Chennai–Tiruchirappalli line is a major electrified broad-gauge railway corridor in Tamil Nadu, India, connecting the state capital Chennai with the important inland city of Tiruchirappalli and forming part of the busy Southern Railway network.
  • B. Chennai–Bangalore line
    The Chennai–Bangalore line is a major Indian Railways trunk route connecting the cities of Chennai in Tamil Nadu and Bengaluru in Karnataka, serving numerous intermediate towns and suburban areas.
  • C. Chennai–Coimbatore line
    The Chennai–Coimbatore line is a major railway route in the Indian state of Tamil Nadu that connects the state capital Chennai with the industrial city of Coimbatore, serving as a key corridor for both passenger and freight traffic.
  • D. Coimbatore–Shoranur line
    The Coimbatore–Shoranur line is a key broad-gauge railway route in southern India that connects Coimbatore in Tamil Nadu with Shoranur in Kerala, facilitating major passenger and freight movement between the two states.
  • E. Jolarpettai–Shoranur line
    The Jolarpettai–Shoranur line is a major broad-gauge railway route in southern India that connects Tamil Nadu with Kerala, serving as an important corridor for both passenger and freight traffic.
  • 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–Thiruvananthapuram line
Triple: [Southern Railway zone, notableRoute, Chennai–Thiruvananthapuram line]
Generated description
The Chennai–Thiruvananthapuram line is a major Indian Railways route in South India that connects Tamil Nadu’s capital Chennai with Kerala’s capital Thiruvananthapuram, serving numerous important cities and towns along the way.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Chennai–Thiruvananthapuram line
Target entity description: The Chennai–Thiruvananthapuram line is a major Indian Railways route in South India that connects Tamil Nadu’s capital Chennai with Kerala’s capital Thiruvananthapuram, serving numerous important cities and towns along the way.
  • A. Chennai–Tiruchirappalli line
    The Chennai–Tiruchirappalli line is a major electrified broad-gauge railway corridor in Tamil Nadu, India, connecting the state capital Chennai with the important inland city of Tiruchirappalli and forming part of the busy Southern Railway network.
  • B. Chennai–Bangalore line
    The Chennai–Bangalore line is a major Indian Railways trunk route connecting the cities of Chennai in Tamil Nadu and Bengaluru in Karnataka, serving numerous intermediate towns and suburban areas.
  • C. Chennai–Coimbatore line
    The Chennai–Coimbatore line is a major railway route in the Indian state of Tamil Nadu that connects the state capital Chennai with the industrial city of Coimbatore, serving as a key corridor for both passenger and freight traffic.
  • D. Coimbatore–Shoranur line
    The Coimbatore–Shoranur line is a key broad-gauge railway route in southern India that connects Coimbatore in Tamil Nadu with Shoranur in Kerala, facilitating major passenger and freight movement between the two states.
  • E. Jolarpettai–Shoranur line
    The Jolarpettai–Shoranur line is a major broad-gauge railway route in southern India that connects Tamil Nadu with Kerala, serving as an important corridor for both passenger and freight traffic.
  • 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_69d8076cc45c81908123123f43e69266 completed April 9, 2026, 8:09 p.m.
NER Named-entity recognition batch_69d97f2a71a0819098bb6cf8a4b2208a completed April 10, 2026, 10:52 p.m.
NED1 Entity disambiguation (via context triple) batch_69f6d5fbaea8819080ca249159d6c125 completed May 3, 2026, 4:58 a.m.
NEDg Description generation batch_69f6d943a80c81909bc39b9a9ef303bd completed May 3, 2026, 5:12 a.m.
NED2 Entity disambiguation (via description) batch_69f6da1e56388190b536831b2c6d493f completed May 3, 2026, 5:16 a.m.
Created at: April 9, 2026, 8:55 p.m.