Howrah–Delhi main line
E520995
The Howrah–Delhi main line is one of India's busiest and most important railway corridors, connecting Kolkata (Howrah) with the national capital New Delhi and passing through major cities across northern and eastern India.
All labels observed (9)
How this entity was disambiguated
This entity first appeared as the object of triple T5445474 — 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: Howrah–Delhi main line Context triple: [Kanpur Central railway station, isMajorJunctionOnLine, Howrah–Delhi main line]
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A.
Howrah–Bardhaman main line
The Howrah–Bardhaman main line is a major suburban and long-distance railway corridor in West Bengal, India, connecting Howrah (Kolkata) with Bardhaman and serving numerous important towns along the route.
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B.
Howrah–New Jalpaiguri line
The Howrah–New Jalpaiguri line is a major railway route in the Indian state of West Bengal that connects Kolkata’s Howrah station with New Jalpaiguri, serving as a key corridor between southern and northern Bengal.
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C.
Howrah–Nagpur–Mumbai line
The Howrah–Nagpur–Mumbai line is a major Indian Railways trunk route connecting Kolkata (Howrah) in the east with Mumbai in the west via Nagpur, serving as a key corridor for both passenger and freight traffic across central India.
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D.
Delhi–Ambala railway line
The Delhi–Ambala railway line is a key rail corridor in northern India connecting the national capital Delhi with the city of Ambala, serving major towns and districts along its route.
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E.
Delhi–Jammu Tawi line
The Delhi–Jammu Tawi line is a key Indian Railways route connecting the national capital Delhi with the city of Jammu, serving as a major passenger and strategic corridor in North India.
- 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: Howrah–Delhi main line Target entity description: The Howrah–Delhi main line is one of India's busiest and most important railway corridors, connecting Kolkata (Howrah) with the national capital New Delhi and passing through major cities across northern and eastern India.
-
A.
Howrah–Bardhaman main line
The Howrah–Bardhaman main line is a major suburban and long-distance railway corridor in West Bengal, India, connecting Howrah (Kolkata) with Bardhaman and serving numerous important towns along the route.
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B.
Howrah–New Jalpaiguri line
The Howrah–New Jalpaiguri line is a major railway route in the Indian state of West Bengal that connects Kolkata’s Howrah station with New Jalpaiguri, serving as a key corridor between southern and northern Bengal.
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C.
Howrah–Nagpur–Mumbai line
The Howrah–Nagpur–Mumbai line is a major Indian Railways trunk route connecting Kolkata (Howrah) in the east with Mumbai in the west via Nagpur, serving as a key corridor for both passenger and freight traffic across central India.
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D.
Delhi–Ambala railway line
The Delhi–Ambala railway line is a key rail corridor in northern India connecting the national capital Delhi with the city of Ambala, serving major towns and districts along its route.
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E.
Delhi–Jammu Tawi line
The Delhi–Jammu Tawi line is a key Indian Railways route connecting the national capital Delhi with the city of Jammu, serving as a major passenger and strategic corridor in North India.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
railway corridor
ⓘ
railway line ⓘ |
| connects |
Kolkata
NERFINISHED
ⓘ
New Delhi NERFINISHED ⓘ |
| connectsRegion |
eastern India
ⓘ
northern India ⓘ |
| country | India ⓘ |
| electrification | fully electrified ⓘ |
| endCity | New Delhi NERFINISHED ⓘ |
| endPoint | New Delhi railway station NERFINISHED ⓘ |
| gauge |
1,676 mm broad gauge
ⓘ
5 ft 6 in broad gauge ⓘ |
| historicalAssociation | East Indian Railway Company NERFINISHED ⓘ |
| importance |
one of the busiest railway corridors in India
ⓘ
one of the most important railway routes in India ⓘ |
| majorStation |
Aligarh Junction
NERFINISHED
ⓘ
Barddhaman Junction NERFINISHED ⓘ Dhanbad Junction NERFINISHED ⓘ Gaya Junction NERFINISHED ⓘ Ghaziabad Junction NERFINISHED ⓘ Howrah Junction NERFINISHED ⓘ Kanpur Central NERFINISHED ⓘ Prayagraj Junction NERFINISHED ⓘ Pt. Deen Dayal Upadhyaya Junction NERFINISHED ⓘ Varanasi Junction NERFINISHED ⓘ |
| operator | Indian Railways NERFINISHED ⓘ |
| owner | Indian Railways NERFINISHED ⓘ |
| partOf |
Golden Quadrilateral railway network
NERFINISHED
ⓘ
Howrah–Gaya–Delhi line NERFINISHED ⓘ |
| passesThrough |
Bihar
NERFINISHED
ⓘ
Delhi NERFINISHED ⓘ Jharkhand NERFINISHED ⓘ Uttar Pradesh NERFINISHED ⓘ West Bengal NERFINISHED ⓘ |
| railwayZone |
East Central Railway
NERFINISHED
ⓘ
Eastern Railway NERFINISHED ⓘ North Central Railway NERFINISHED ⓘ Northern Railway NERFINISHED ⓘ |
| servesCity |
Dhanbad
NERFINISHED
ⓘ
Gaya NERFINISHED ⓘ Kanpur NERFINISHED ⓘ Kolkata NERFINISHED ⓘ New Delhi NERFINISHED ⓘ Prayagraj NERFINISHED ⓘ Varanasi NERFINISHED ⓘ |
| startCity | Howrah NERFINISHED ⓘ |
| startMetropolitanArea | Kolkata NERFINISHED ⓘ |
| startPoint | Howrah Junction NERFINISHED ⓘ |
| status | operational ⓘ |
| trackConfiguration | double line or more on most sections ⓘ |
| usedFor |
freight traffic
ⓘ
long-distance passenger traffic ⓘ |
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: Howrah–Delhi main line Description of subject: The Howrah–Delhi main line is one of India's busiest and most important railway corridors, connecting Kolkata (Howrah) with the national capital New Delhi and passing through major cities across northern and eastern India.
Referenced by (18)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Howrah–Prayagraj–Delhi line
this entity surface form:
Howrah–Delhi main railway line
this entity surface form:
Howrah–Delhi main railway line
this entity surface form:
Howrah–Delhi main line segments
this entity surface form:
Howrah–Patna–Mughalsarai route segments
this entity surface form:
Howrah–Delhi main line sections
Mughalsarai (nearby, in Uttar Pradesh but serving region)
→
onRailwayLine
→
Howrah–Delhi main line
ⓘ
subject surface form:
Mughalsarai Junction railway station
Mughalsarai (nearby, in Uttar Pradesh but serving region)
→
onRailwayLine
→
Howrah–Delhi main line
ⓘ
subject surface form:
Mughalsarai Junction railway station
this entity surface form:
Howrah–Gaya–Delhi line
this entity surface form:
Howrah–Delhi main railway line
subject surface form:
Central Uttar Pradesh
this entity surface form:
Delhi–Howrah main railway line
this entity surface form:
Delhi–Howrah main line (nearby through Etawah–Kanpur section)