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

[EX Q]: 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?
[EX A]: 1963

[EX Q]: Context : Helen Pitts Douglass (1838 -- 1903) was an American suffragist and abolitionist, best known for being the second wife of Frederick Douglass. 
Question : What is Helen Pitts Douglass's spouse's name?
[EX A]: Frederick Douglass

[EX Q]: Context : Phoebe Campbell (c. 1847 -- 20 June 1872) was a Canadian woman who was hanged for the murder of her husband. 
Question : Which crime led to the conviction of Phoebe Campbell?
[EX A]:
murder