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

Context : The 1935 Quetta earthquake (Urdu: ) occurred on 31 May 1935 between 2:33 am and 3:40 am at Quetta, Balochistan, British Raj (now part of Pakistan).
Question : What date is associated with 1935 Quetta earthquake?
31 May 1935

Context : The Mark 10 torpedo was a torpedo put into use by the United States in 1915.
Question : In what year did Mark 10 torpedo enter service?
1915

Context : On 15 April 2008, Hewa Bora Airways Flight 122, a McDonnell Douglas DC-9-51 plane crashed into a residential and market area of Goma of the Democratic Republic of the Congo immediately south of Goma International Airport.
Question : On what date did Hewa Bora Airways Flight 122 take place?
15 April 2008