Jon Stephenson von Tetzchner

E51184

businessperson entrepreneur human software developer

Jon Stephenson von Tetzchner is an Icelandic-Norwegian software developer and entrepreneur best known as the co-founder and longtime CEO of the Opera web browser company and later founder of the Vivaldi browser.

Try in SPARQL Jump to: Surface forms Statements Referenced by

All labels observed (2)

Label	Occurrences
Jon Stephenson von Tetzchner canonical	7
von Tetzchner	1

Statements (38)

Predicate	Object
instanceOf	businessperson ⓘ entrepreneur ⓘ human ⓘ software developer ⓘ
associatedWith	Opera Software ⓘ Vivaldi Technologies ⓘ
citizenship	Iceland ⓘ Norway ⓘ
coFounded	Opera Software ⓘ
countryOfResidence	Iceland ⓘ
developed	Opera web browser ⓘ Vivaldi web browser ⓘ
familyName	Jon Stephenson von Tetzchner self-linksurface differs ⓘ surface form: von Tetzchner
fieldOfWork	software industry ⓘ web browser development ⓘ
founded	Brave Software ⓘ surface form: Vivaldi Technologies
givenName	Jonathan ⓘ surface form: Jon
hasGender	male ⓘ
industry	software ⓘ technology ⓘ
knownFor	co-founding Opera Software ⓘ creating the Vivaldi web browser ⓘ founding Vivaldi Technologies ⓘ serving as CEO of Opera Software ⓘ
languageSpoken	English ⓘ Icelandic ⓘ Norwegian ⓘ
name	Jon Stephenson von Tetzchner self-link ⓘ
nationality	Icelandic ⓘ Norwegian ⓘ
notableRole	longtime CEO of Opera Software ⓘ
notableWork	Opera web browser ⓘ Vivaldi web browser ⓘ
occupation	business executive ⓘ entrepreneur ⓘ software developer ⓘ
positionHeld	Chief Executive Officer of Opera Software ⓘ Chief Executive Officer of Vivaldi Technologies ⓘ

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: Jon Stephenson von Tetzchner
Description of subject: Jon Stephenson von Tetzchner is an Icelandic-Norwegian software developer and entrepreneur best known as the co-founder and longtime CEO of the Opera web browser company and later founder of the Vivaldi browser.

Referenced by (8)

Full triples — surface form annotated when it differs from this entity's canonical label.

Opera Software → foundedBy → Jon Stephenson von Tetzchner ⓘ

Jon Stephenson von Tetzchner → name → Jon Stephenson von Tetzchner self-link ⓘ

Jon Stephenson von Tetzchner → familyName → Jon Stephenson von Tetzchner self-linksurface differs ⓘ

this entity surface form: von Tetzchner

Opera Limited → foundedBy → Jon Stephenson von Tetzchner ⓘ

Vivaldi web browser → hasFounder → Jon Stephenson von Tetzchner ⓘ

Vivaldi Technologies → foundedBy → Jon Stephenson von Tetzchner ⓘ

Vivaldi Technologies → coFoundedBy → Jon Stephenson von Tetzchner ⓘ

Vivaldi Technologies → hasKeyPerson → Jon Stephenson von Tetzchner ⓘ