Instructions: Generate a correct and concise answer for the question based on the words in the context.
Input: Context : Donald George Mackay CBE (29 June 1870 -- 17 September 1958) was an Australian outdoorsman, long-distance cyclist, and explorer who conducted several expeditions to the remotest areas of the Australian continent.
Question : What year did Donald George Mackay die?
Output:
17 September 1958