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

[Q]: Context : By the start of World War II Heinz Hämel had been promoted to Oberscharführer (Technical Sergeant) and was a platoon commander. 
Question : Which war did Heinz Hämel serve in?
[A]: World War II


[Q]: Context : Master of the View of Ste-Gudule (active 1480 -- 1499), was an Early Netherlandish painter. 
Question : When was Master of the View of Ste-Gudule's death?
[A]: 1499


[Q]: Context : François Huber was only fifteen years old when he began to suffer from a disease which gradually resulted in total blindness; but, with the aid of his wife, Marie Aimée Lullin, and of his servant, François Burnens, he was able to carry out investigations that laid the foundations of a scientific knowledge of the life history of the honey bee. 
Question : What was François Huber's medical condition near the end of his life?
[A]:
blindness