Triple
T14820538
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Chennai Central Metro |
E348438
|
entity |
| Predicate | operator |
P179
|
FINISHED |
| Object |
Chennai Metro Rail Limited
Chennai Metro Rail Limited is the state-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 Central 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 Central Metro, operator, Chennai Metro Rail Limited]
-
A.
Metropolitan Transport Corporation (Chennai) Limited
Metropolitan Transport Corporation (Chennai) Limited is a state-owned public bus operator providing urban and suburban transport services in and around Chennai, India.
-
B.
Bangalore Metro Rail Corporation Limited
Bangalore Metro Rail Corporation Limited is the joint venture public sector company responsible for developing, operating, and expanding the Namma Metro rapid transit system in Bengaluru, India.
-
C.
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.
-
D.
Hyderabad Metro Rail Limited
Hyderabad Metro Rail Limited is the public sector company responsible for developing, operating, and maintaining the Hyderabad Metro rapid transit system in Hyderabad, India.
-
E.
Maharashtra Metro Rail Corporation Limited
Maharashtra Metro Rail Corporation Limited is a state-owned joint venture between the Government of India and the Government of Maharashtra responsible for planning, constructing, and operating metro rail systems in Maharashtra, including the Nagpur Metro.
- 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 Central Metro, operator, Chennai Metro Rail Limited]
Generated description
Chennai Metro Rail Limited is the state-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 state-owned company responsible for developing, operating, and maintaining the Chennai Metro rapid transit system in Chennai, India.
-
A.
Metropolitan Transport Corporation (Chennai) Limited
Metropolitan Transport Corporation (Chennai) Limited is a state-owned public bus operator providing urban and suburban transport services in and around Chennai, India.
-
B.
Bangalore Metro Rail Corporation Limited
Bangalore Metro Rail Corporation Limited is the joint venture public sector company responsible for developing, operating, and expanding the Namma Metro rapid transit system in Bengaluru, India.
-
C.
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.
-
D.
Hyderabad Metro Rail Limited
Hyderabad Metro Rail Limited is the public sector company responsible for developing, operating, and maintaining the Hyderabad Metro rapid transit system in Hyderabad, India.
-
E.
Maharashtra Metro Rail Corporation Limited
Maharashtra Metro Rail Corporation Limited is a state-owned joint venture between the Government of India and the Government of Maharashtra responsible for planning, constructing, and operating metro rail systems in Maharashtra, including the Nagpur Metro.
- 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_69d822eb8f588190bf53445e730a934f |
completed | April 9, 2026, 10:06 p.m. |
| NER | Named-entity recognition | batch_69decfe64328819083ce42704cf0602d |
completed | April 14, 2026, 11:38 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69fe389bc06c8190a8269c07677d9c35 |
completed | May 8, 2026, 7:25 p.m. |
| NEDg | Description generation | batch_69fe3d5bf82c8190a82ba25856261871 |
completed | May 8, 2026, 7:45 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69fe3df82ba48190a4c721d56fe36f2c |
completed | May 8, 2026, 7:48 p.m. |
Created at: April 10, 2026, 1:50 a.m.