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

Example Input: Context : The M-63 Plamen (English: Flame) is a 128mm multiple rocket launcher developed in 1963 in Yugoslavia for use in the Yugoslav People's Army. 
Question : What year was M-63 Plamen commissioned?
Example Output: 1963

Example Input: Context : Khadijeh Saqafi (aka Ghods Iran Saqafi) (1913 -- 21 March 2009) was the wife of Ayatollah Ruhollah Khomeini, the leader of the 1979 Iranian Revolution. 
Question : What is Khadijeh Saqafi's spouse's name?
Example Output: Ruhollah Khomeini

Example Input: Context : China Airlines Flight 642 was a flight that crashed at Hong Kong International Airport on 22 August 1999. 
Question : The date of China Airlines Flight 642 was what?
Example Output:
22 August 1999