Triple
T535833
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Chennai |
E12324
|
entity |
| Predicate | hasMetroSystem |
P522
|
FINISHED |
| Object |
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.
|
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 | Statement: [Chennai, hasMetroSystem, Chennai Metro]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Chennai Metro Context triple: [Chennai, hasMetroSystem, Chennai Metro]
-
A.
Mumbai Metro
Mumbai Metro is a rapid transit system serving the Mumbai metropolitan region, designed to alleviate congestion and complement the city’s suburban railway network.
-
B.
Delhi Metro
Delhi Metro is a rapid transit system serving Delhi and its surrounding metropolitan region, known for its extensive network, modern infrastructure, and role in easing urban congestion.
-
C.
Mumbai Monorail
Mumbai Monorail is an elevated urban rail system in Mumbai, India, designed to supplement the city's existing public transport network and ease congestion.
-
D.
Mumbai Suburban Railway
The Mumbai Suburban Railway is a high-capacity commuter rail network that forms the backbone of public transport in the Mumbai metropolitan region, carrying millions of passengers daily across its extensive routes.
-
E.
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.
- 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 Triple: [Chennai, hasMetroSystem, Chennai Metro]
Generated description
Chennai Metro is a rapid transit system serving the Indian city of Chennai, providing urban rail connectivity across key residential, commercial, and industrial areas.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Chennai Metro Target entity description: Chennai Metro is a rapid transit system serving the Indian city of Chennai, providing urban rail connectivity across key residential, commercial, and industrial areas.
-
A.
Mumbai Metro
Mumbai Metro is a rapid transit system serving the Mumbai metropolitan region, designed to alleviate congestion and complement the city’s suburban railway network.
-
B.
Delhi Metro
Delhi Metro is a rapid transit system serving Delhi and its surrounding metropolitan region, known for its extensive network, modern infrastructure, and role in easing urban congestion.
-
C.
Mumbai Monorail
Mumbai Monorail is an elevated urban rail system in Mumbai, India, designed to supplement the city's existing public transport network and ease congestion.
-
D.
Mumbai Suburban Railway
The Mumbai Suburban Railway is a high-capacity commuter rail network that forms the backbone of public transport in the Mumbai metropolitan region, carrying millions of passengers daily across its extensive routes.
-
E.
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.
- 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_69a4933208e88190891f5debab1b776d |
completed | March 1, 2026, 7:27 p.m. |
| NER | Named-entity recognition | batch_69a496d904408190a2ed16c839017623 |
completed | March 1, 2026, 7:43 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69a4d0403b248190a94b44b6073c500b |
completed | March 1, 2026, 11:48 p.m. |
| NEDg | Description generation | batch_69a4d0aefa00819087320c7df48d8998 |
completed | March 1, 2026, 11:50 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69a4d130c6f081909b628aeafd2fc319 |
completed | March 1, 2026, 11:52 p.m. |
Created at: March 1, 2026, 7:32 p.m.