instruction:
Generate a correct and concise answer for the question based on the words in the context.
question:
Context : Mélanie de Salignac (Marennes, Charente-Maritime, 19 January 1744 --1766) was a young French woman whose achievements in the face of her disability - blindness - were mentioned in the accounts of Diderot. 
Question : What illness negatively impacted Mélanie de Salignac?
answer:
blindness


question:
Context : She committed suicide at the age of 21 on March 17,1974, because of a constant blackmailing from Kunchako,who caught some accidental nude clips of Vijayasree during a bath scene song 'Valliyoor Kaavile' from the movie Ponnapuram Kotta.Kunchako is the director of that movie.There is also a mention of an interview that Vijayasree had given to Nana Film Weekly in 1973 ( presumably post the month of March 1973, when Ponnapuram Kotta was released ) where she lashes out at this certain ``respectable'' Producer-Director who has ended up being a Monster and her career-nemesis.It is also said that Kunchako (with the support of his brother Navodaya Appachan) murdered Vijayasree.After two years,Kunchako dies on the fifth death anniversary of legendary malayalam actor Sathyan.Kunchako's Udaya Studios faced heavy losses later. 
Question : In one word, how did Vijayasree die?
answer:
suicide


question:
Context : In 1961, the first M79 grenade launchers were delivered to the US Army. 
Question : What year was the service entry date for M79 grenade launcher?
answer:

1961