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

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?
1963

Context : Lorenzo wrote after Lafargue's death: ``The double, original and, whatever the rutinarians say, even sympathetic suicide of Paul Lafargue and Laura Marx (in Spain, women keep their maiden surname after marriage), who knew and could live united and lovers until death, has awakened my memories (...) Lafargue was my teacher: his memory is for me almost as important as that of Fanelli. 
Question : What is Paul Lafargue's spouse's name?
Laura Marx

Context : The Duchess of Richmond's ball was held in Brussels on 15 June 1815, the night before the Battle of Quatre Bras, by Charlotte, Duchess of Richmond. 
Question : The point in time of Duchess of Richmond's ball was when?

15 June 1815