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

Q: Context : Irina Malkova (born 23 March 1989) is a Russian female volleyball player. 
Question : What kind of  occupation does Irina Malkova have?

A: volleyball player
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Q: Context : Antonio Machín (Antonio Abad Lugo Machín; 11 February 1903, in Sagua la Grande, Cuba -- 4 August 1977, in Madrid) was a Cuban singer and musician. 
Question : The year Antonio Machín died was what?

A: 4 August 1977
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Q: Context : Theora is derived from the formerly proprietary VP3 codec, released into the public domain by On2 Technologies. 
Question : Which is the basis of Theora?

A:
VP3
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