Generate a correct and concise answer for the question based on the words in the context.

[Q]: Context : National Coming Out Day (NCOD) is an annual LGBTQI awareness day observed on October 11.
Question : The point in time of National Coming Out Day was when?
[A]: October 11

[Q]: Context : The Type 97 motorcycle, or Rikuo, was a copy of a Harley-Davidson motorcycle produced from 1935 in Japan under license from Harley-Davidson by the Sankyo Company (later Rikuo Nainen Company).
Question : What was the year Type 97 motorcycle entered service?
[A]: 1935

[Q]: Context : To encourage the adoption of Windows 10, Microsoft announced that during its first year of availability, upgrades to the operating system would be made available free of charge to users of genuine copies of eligible editions of Windows 7, and Windows 8 after update to Windows 8.1.
Question : The Windows 10 is based upon what?
[A]:
Windows 8.1