Bharat Ophthalmic Glass Limited (historical)
E641039
Bharat Ophthalmic Glass Limited was a Durgapur-based manufacturer specializing in optical and ophthalmic glass products, historically significant in India’s eye-care and optical industries.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Bharat Ophthalmic Glass Limited (historical) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7084904 — 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: Bharat Ophthalmic Glass Limited (historical) Context triple: [Durgapur, hasCompany, Bharat Ophthalmic Glass Limited (historical)]
-
A.
Godrej & Boyce Manufacturing Company Limited
Godrej & Boyce Manufacturing Company Limited is a major Indian conglomerate known for its diversified businesses spanning consumer products, appliances, industrial engineering, and security solutions.
-
B.
India Optel Limited
India Optel Limited is an Indian state-owned defence public sector undertaking specializing in the manufacture of optoelectronic and related military equipment.
-
C.
American Optical Company
American Optical Company is a historic U.S. manufacturer best known for producing eyeglasses, optical instruments, and pioneering lens technologies.
-
D.
Yantra India Limited
Yantra India Limited is an Indian state-owned defence manufacturing company formed from the corporatization of the Ordnance Factory Board, specializing in the production of arms, ammunition, and related equipment.
-
E.
Bengal Chemicals & Pharmaceuticals
Bengal Chemicals & Pharmaceuticals is one of India’s earliest indigenous pharmaceutical and chemical manufacturing companies, established in the late 19th century and known for pioneering the country’s modern chemical industry.
- 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: Bharat Ophthalmic Glass Limited (historical) Target entity description: Bharat Ophthalmic Glass Limited was a Durgapur-based manufacturer specializing in optical and ophthalmic glass products, historically significant in India’s eye-care and optical industries.
-
A.
Godrej & Boyce Manufacturing Company Limited
Godrej & Boyce Manufacturing Company Limited is a major Indian conglomerate known for its diversified businesses spanning consumer products, appliances, industrial engineering, and security solutions.
-
B.
India Optel Limited
India Optel Limited is an Indian state-owned defence public sector undertaking specializing in the manufacture of optoelectronic and related military equipment.
-
C.
American Optical Company
American Optical Company is a historic U.S. manufacturer best known for producing eyeglasses, optical instruments, and pioneering lens technologies.
-
D.
Yantra India Limited
Yantra India Limited is an Indian state-owned defence manufacturing company formed from the corporatization of the Ordnance Factory Board, specializing in the production of arms, ammunition, and related equipment.
-
E.
Bengal Chemicals & Pharmaceuticals
Bengal Chemicals & Pharmaceuticals is one of India’s earliest indigenous pharmaceutical and chemical manufacturing companies, established in the late 19th century and known for pioneering the country’s modern chemical industry.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
company
ⓘ
manufacturer ⓘ |
| associatedWith |
Indian eye-care sector
ⓘ
Indian optical sector ⓘ |
| basedInIndustrialCity | Durgapur ⓘ |
| city | Durgapur ⓘ |
| country | India ⓘ |
| focus | production of optical and ophthalmic glass ⓘ |
| industry |
ophthalmic glass manufacturing
ⓘ
optical glass manufacturing ⓘ |
| location | Durgapur ⓘ |
| materialType | specialty glass ⓘ |
| product |
ophthalmic glass
ⓘ
optical glass ⓘ |
| productCategory |
eye-care related glass products
ⓘ
optical industry components ⓘ |
| regionServed | India ⓘ |
| sector |
healthcare-related manufacturing
ⓘ
industrial manufacturing ⓘ |
| significance |
historically significant in India’s eye-care industry
ⓘ
historically significant in India’s optical industry ⓘ |
| state | West Bengal ⓘ |
| status | historical entity ⓘ |
| usedFor |
eye-care applications
ⓘ
optical instruments ⓘ |
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: Bharat Ophthalmic Glass Limited (historical) Description of subject: Bharat Ophthalmic Glass Limited was a Durgapur-based manufacturer specializing in optical and ophthalmic glass products, historically significant in India’s eye-care and optical industries.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.