instruction:
Generate a correct and concise answer for the question based on the words in the context.
question:
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?
answer:
1963


question:
Context : ``Intro to Knots'' is the tenth episode of the fourth season of the NBC sitcom Community, which originally aired on April 18, 2013. 
Question : Which series is Intro to Knots apart of?
answer:
Community


question:
Context : Karl-Heinz Ertel (26 November 1919 -- 25 January 1993) was a SS-Hauptsturmführer of the Reserves, in the Waffen-SS during World War II who was awarded the Knight's Cross of the Iron Cross, to recognize extreme battlefield bravery or successful military leadership by Nazi Germany during World War II. 
Question : Which award was bestowed upon Karl-Heinz Ertel?
answer:

Knight's Cross of the Iron Cross