Radhanath Sikdar
E644267
Radhanath Sikdar was a 19th-century Indian mathematician and surveyor best known for calculating the height of Mount Everest as the world’s tallest peak.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Radhanath Sikdar canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T7121516 — 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: Radhanath Sikdar Context triple: [Young Bengal movement, member, Radhanath Sikdar]
-
A.
Sachindra Nath Sanyal
Sachindra Nath Sanyal was an Indian revolutionary leader and co-founder of the Hindustan Republican Association who played a key role in the early armed struggle against British colonial rule.
-
B.
Virendranath Chattopadhyaya
Virendranath Chattopadhyaya was an Indian nationalist and revolutionary leader who played a key role in anti-British activities abroad during the Indian independence movement.
-
C.
Sisir Kumar Mitra
Sisir Kumar Mitra was a pioneering Indian physicist and radio scientist renowned for his groundbreaking research on the ionosphere and atmospheric physics.
-
D.
Janakinath Bose
Janakinath Bose was an Indian lawyer and prominent figure in Cuttack society, best known as the father of nationalist leader Subhas Chandra Bose.
-
E.
Ashutosh Mukherjee
Ashutosh Mukherjee was a prominent Indian educator, jurist, and nationalist leader who played a key role in shaping modern higher education in Bengal and served as Vice-Chancellor of the University of Calcutta.
- 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: Radhanath Sikdar Target entity description: Radhanath Sikdar was a 19th-century Indian mathematician and surveyor best known for calculating the height of Mount Everest as the world’s tallest peak.
-
A.
Sachindra Nath Sanyal
Sachindra Nath Sanyal was an Indian revolutionary leader and co-founder of the Hindustan Republican Association who played a key role in the early armed struggle against British colonial rule.
-
B.
Virendranath Chattopadhyaya
Virendranath Chattopadhyaya was an Indian nationalist and revolutionary leader who played a key role in anti-British activities abroad during the Indian independence movement.
-
C.
Sisir Kumar Mitra
Sisir Kumar Mitra was a pioneering Indian physicist and radio scientist renowned for his groundbreaking research on the ionosphere and atmospheric physics.
-
D.
Janakinath Bose
Janakinath Bose was an Indian lawyer and prominent figure in Cuttack society, best known as the father of nationalist leader Subhas Chandra Bose.
-
E.
Ashutosh Mukherjee
Ashutosh Mukherjee was a prominent Indian educator, jurist, and nationalist leader who played a key role in shaping modern higher education in Bengal and served as Vice-Chancellor of the University of Calcutta.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
Indian mathematician
ⓘ
Indian surveyor ⓘ mathematician ⓘ person ⓘ surveyor ⓘ |
| associatedWith | Mount Everest ⓘ |
| birthYear | 1813 ⓘ |
| contributedTo | measurement of Himalayan peaks ⓘ |
| deathYear | 1870 ⓘ |
| discovered | that Peak XV was the highest mountain in the world ⓘ |
| employer | Great Trigonometrical Survey of India ⓘ |
| era | 19th century ⓘ |
| ethnicity | Bengali ⓘ |
| fieldOfWork |
geodesy
ⓘ
mathematics ⓘ surveying ⓘ |
| gender | male ⓘ |
| historicalSignificance | early Indian contributor to modern geodesy ⓘ |
| knownFor |
calculating the height of Mount Everest
ⓘ
identifying Mount Everest as the world’s tallest peak ⓘ |
| name | Radhanath Sikdar ⓘ |
| nationality | Indian ⓘ |
| notableAchievement | computed the height of Peak XV (later named Mount Everest) ⓘ |
| occupation |
mathematician
ⓘ
surveyor ⓘ |
| placeOfActivity | British India ⓘ |
| recognizedAs | one of the first Indians to hold a responsible position in the Great Trigonometrical Survey ⓘ |
| region | Bengal ⓘ |
| usedMethod | trigonometric calculations for height measurement ⓘ |
| workedOn | Great Trigonometrical Survey of India ⓘ |
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: Radhanath Sikdar Description of subject: Radhanath Sikdar was a 19th-century Indian mathematician and surveyor best known for calculating the height of Mount Everest as the world’s tallest peak.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.