Chennai–Coimbatore line
E675773
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Chennai–Coimbatore line canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T7590144 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Chennai–Coimbatore line Context triple: [Coimbatore Junction railway station, railwayLine, Chennai–Coimbatore 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.
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B.
Tiruchirappalli–Dindigul line
The Tiruchirappalli–Dindigul line is a key broad-gauge railway route in Tamil Nadu, India, connecting the major cities of Tiruchirappalli and Dindigul and serving as an important link in the Southern Railway network.
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C.
Tiruchirappalli–Madurai line
The Tiruchirappalli–Madurai line is a key railway route in the Indian state of Tamil Nadu that connects the major cities of Tiruchirappalli and Madurai, serving as an important corridor for both passenger and freight traffic.
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D.
Tiruchirappalli–Karur line
The Tiruchirappalli–Karur line is a railway route in the Indian state of Tamil Nadu that connects the city of Tiruchirappalli with Karur, serving as an important regional link for passenger and freight traffic.
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E.
Tiruchirappalli–Thanjavur line
The Tiruchirappalli–Thanjavur line is a key railway route in Tamil Nadu, India, connecting the major cities of Tiruchirappalli and Thanjavur and serving as an important corridor for regional passenger and freight traffic.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Chennai–Coimbatore line Target entity description: 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.
-
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.
Tiruchirappalli–Dindigul line
The Tiruchirappalli–Dindigul line is a key broad-gauge railway route in Tamil Nadu, India, connecting the major cities of Tiruchirappalli and Dindigul and serving as an important link in the Southern Railway network.
-
C.
Tiruchirappalli–Madurai line
The Tiruchirappalli–Madurai line is a key railway route in the Indian state of Tamil Nadu that connects the major cities of Tiruchirappalli and Madurai, serving as an important corridor for both passenger and freight traffic.
-
D.
Tiruchirappalli–Karur line
The Tiruchirappalli–Karur line is a railway route in the Indian state of Tamil Nadu that connects the city of Tiruchirappalli with Karur, serving as an important regional link for passenger and freight traffic.
-
E.
Tiruchirappalli–Thanjavur line
The Tiruchirappalli–Thanjavur line is a key railway route in Tamil Nadu, India, connecting the major cities of Tiruchirappalli and Thanjavur and serving as an important corridor for regional passenger and freight traffic.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
railway corridor
ⓘ
railway line ⓘ |
| connects |
Chennai
NERFINISHED
ⓘ
Coimbatore NERFINISHED ⓘ major industrial city of Coimbatore ⓘ state capital of Tamil Nadu ⓘ |
| country | India ⓘ |
| electrification | electric ⓘ |
| endPoint | Coimbatore NERFINISHED ⓘ |
| gauge | broad gauge ⓘ |
| hasMajorStation |
Arakkonam Junction
NERFINISHED
ⓘ
Chennai Central NERFINISHED ⓘ Chennai Egmore NERFINISHED ⓘ Coimbatore Junction NERFINISHED ⓘ Erode Junction NERFINISHED ⓘ Katpadi Junction NERFINISHED ⓘ Salem Junction NERFINISHED ⓘ Tiruppur NERFINISHED ⓘ |
| hasTerminus |
Chennai
NERFINISHED
ⓘ
Coimbatore NERFINISHED ⓘ |
| importance |
key corridor for freight traffic
ⓘ
key corridor for passenger traffic ⓘ major railway route in Tamil Nadu ⓘ |
| locatedIn |
Chennai district
NERFINISHED
ⓘ
Coimbatore district NERFINISHED ⓘ Cuddalore district NERFINISHED ⓘ Erode district NERFINISHED ⓘ Salem district NERFINISHED ⓘ Tamil Nadu ⓘ Villupuram district NERFINISHED ⓘ |
| network | Indian Railways broad-gauge network ⓘ |
| operator | Indian Railways NERFINISHED ⓘ |
| partOf | Southern Railway zone NERFINISHED ⓘ |
| passesThrough |
agricultural regions of Tamil Nadu
ⓘ
industrial regions of Tamil Nadu ⓘ |
| regionServed |
eastern Tamil Nadu
ⓘ
western Tamil Nadu NERFINISHED ⓘ |
| servesAs |
freight corridor
ⓘ
passenger corridor ⓘ |
| startPoint | Chennai NERFINISHED ⓘ |
| usedFor |
express trains
ⓘ
freight trains ⓘ long-distance passenger trains ⓘ superfast trains ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Chennai–Coimbatore line Description of subject: 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.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.