What version of Debian is Ubuntu based on?

Related questions

1. Is Debian a server OS?
2. Is Kali better than Ubuntu?
3. What is Kali Linux KDE?
4. Is Kali Linux safe?
5. Is Ubuntu a fork of Debian?
6. What is Jessie Linux?
7. When was Debian released?
8. Does Debian use RPM?

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4. #release
5. #linux
6. #standard
7. #output
8. #print
9. #debian
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11. #version
12. #distribution
13. #ubuntu
14. #command
15. #information
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17. #running