Cal Henderson
E282023
Cal Henderson is a British software engineer and entrepreneur best known as the co-founder and CTO of the workplace communication platform Slack.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Cal Henderson canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T1634959 — 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: Cal Henderson Context triple: [Slack, founder, Cal Henderson]
-
A.
Ray Cusick
Ray Cusick was a British designer best known for creating the iconic look of the Daleks in the long-running science fiction television series Doctor Who.
-
B.
Ron Dixon
Ron Dixon is a former NFL wide receiver and kick returner best known for his explosive return touchdowns for the New York Giants during their run to Super Bowl XXXV.
-
C.
Cliff Hagan
Cliff Hagan is an American Hall of Fame basketball player best known for his scoring prowess with the St. Louis Hawks and later as a player-coach in the ABA.
-
D.
Glenn Williamson
Glenn Williamson is a film producer known for his work on independent and character-driven movies, including the dark comedy-drama "Sunshine Cleaning."
-
E.
Glen Graham
Glen Graham is an American rock drummer best known as the percussionist for the alternative rock band Blind Melon.
- 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: Cal Henderson Target entity description: Cal Henderson is a British software engineer and entrepreneur best known as the co-founder and CTO of the workplace communication platform Slack.
-
A.
Ray Cusick
Ray Cusick was a British designer best known for creating the iconic look of the Daleks in the long-running science fiction television series Doctor Who.
-
B.
Ron Dixon
Ron Dixon is a former NFL wide receiver and kick returner best known for his explosive return touchdowns for the New York Giants during their run to Super Bowl XXXV.
-
C.
Cliff Hagan
Cliff Hagan is an American Hall of Fame basketball player best known for his scoring prowess with the St. Louis Hawks and later as a player-coach in the ABA.
-
D.
Glenn Williamson
Glenn Williamson is a film producer known for his work on independent and character-driven movies, including the dark comedy-drama "Sunshine Cleaning."
-
E.
Glen Graham
Glen Graham is an American rock drummer best known as the percussionist for the alternative rock band Blind Melon.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
chief technology officer
ⓘ
entrepreneur ⓘ human ⓘ software engineer ⓘ |
| citizenship | United Kingdom ⓘ |
| coFounded | Slack ⓘ |
| employer |
Slack
ⓘ
surface form:
Slack Technologies
|
| familyName | Henderson ⓘ |
| fieldOfWork |
computer programming
ⓘ
software development ⓘ web development ⓘ |
| gender | male ⓘ |
| givenName | Cal ⓘ |
| hasRole |
startup founder
ⓘ
technology leader ⓘ |
| industry |
software industry
ⓘ
technology industry ⓘ |
| knownFor |
co-founding Slack
ⓘ
serving as CTO of Slack ⓘ |
| languageSpoken | English ⓘ |
| name | Cal Henderson self-link ⓘ |
| nationality | British ⓘ |
| notableWork |
Slack
ⓘ
surface form:
Slack workplace communication platform
|
| occupation |
computer programmer
ⓘ
entrepreneur ⓘ software engineer ⓘ technology executive ⓘ |
| positionHeld | Chief Technology Officer of Slack ⓘ |
| residence | San Francisco Bay Area ⓘ |
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: Cal Henderson Description of subject: Cal Henderson is a British software engineer and entrepreneur best known as the co-founder and CTO of the workplace communication platform Slack.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.