Coimbatore–Mettupalayam line
E698335
The Coimbatore–Mettupalayam line is a short broad-gauge railway route in Tamil Nadu, India, connecting the city of Coimbatore with the foothill town of Mettupalayam and serving as a key link to the Nilgiri Mountain Railway.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Coimbatore–Mettupalayam line canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7795938 — 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: Coimbatore–Mettupalayam line Context triple: [Coimbatore North Junction, line, Coimbatore–Mettupalayam line]
-
A.
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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B.
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.
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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.
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.
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E.
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.
- 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: Coimbatore–Mettupalayam line Target entity description: The Coimbatore–Mettupalayam line is a short broad-gauge railway route in Tamil Nadu, India, connecting the city of Coimbatore with the foothill town of Mettupalayam and serving as a key link to the Nilgiri Mountain Railway.
-
A.
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.
-
B.
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.
-
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.
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.
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.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf | railway line ⓘ |
| category |
Rail transport in Tamil Nadu
ⓘ
Railway lines in India ⓘ |
| connects |
Coimbatore metropolitan area
NERFINISHED
ⓘ
foothills of the Nilgiri Hills ⓘ |
| connectsCity | Coimbatore NERFINISHED ⓘ |
| connectsTown | Mettupalayam NERFINISHED ⓘ |
| connectsWith | Nilgiri Mountain Railway NERFINISHED ⓘ |
| country | India ⓘ |
| electrification | electrified ⓘ |
| endPoint | Mettupalayam NERFINISHED ⓘ |
| function | feeder line to Nilgiri Mountain Railway ⓘ |
| gauge |
1676 mm
ⓘ
broad gauge ⓘ |
| geographicFeature | foothills of the Nilgiri Mountains ⓘ |
| hasConnection | Mettupalayam–Udagamandalam section of Nilgiri Mountain Railway NERFINISHED ⓘ |
| hasServiceType |
commuter rail
ⓘ
long-distance passenger rail ⓘ |
| hasTerminusStation |
Coimbatore Junction railway station
NERFINISHED
ⓘ
Mettupalayam railway station NERFINISHED ⓘ |
| linkRole | key link to Nilgiri Mountain Railway ⓘ |
| locatedIn |
Coimbatore district
NERFINISHED
ⓘ
Tamil Nadu ⓘ Tiruppur district NERFINISHED ⓘ |
| locatedOn | Indian subcontinent ⓘ |
| operator | Southern Railway zone NERFINISHED ⓘ |
| owner | Indian Railways NERFINISHED ⓘ |
| partOf | Southern Railway network NERFINISHED ⓘ |
| primaryPurpose |
passenger transport
ⓘ
tourist connectivity to Nilgiri Mountain Railway ⓘ |
| railwayZone | Southern Railway NERFINISHED ⓘ |
| region | Southern Railway zone NERFINISHED ⓘ |
| role | access route to hill station of Ooty via Nilgiri Mountain Railway ⓘ |
| serves |
Coimbatore
NERFINISHED
ⓘ
Mettupalayam NERFINISHED ⓘ Nilgiris region NERFINISHED ⓘ |
| startPoint | Coimbatore Junction NERFINISHED ⓘ |
| state | Tamil Nadu ⓘ |
| system | Indian Railways NERFINISHED ⓘ |
| terminus |
Coimbatore Junction
NERFINISHED
ⓘ
Mettupalayam NERFINISHED ⓘ |
| trackConfiguration | single track ⓘ |
| transportMode | rail ⓘ |
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: Coimbatore–Mettupalayam line Description of subject: The Coimbatore–Mettupalayam line is a short broad-gauge railway route in Tamil Nadu, India, connecting the city of Coimbatore with the foothill town of Mettupalayam and serving as a key link to the Nilgiri Mountain Railway.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.