TASK DEFINITION: Classify the relation of question with context to one of these categories: 1) award received, 2) based on, collection, 3) conflict, 4) constellation, 5) convicted of, 6) date of death, 7) director, 8) drafted by, 9) educated at, 10) medical condition, 11) military branch, 12) narrative location, 13) occupation, 14) original network, 15) parent company, 16) point in time, 17) production company, 18) residence, 19) series, 20) service entry, 21) sex or gender, 22) spouse, 23) standards body question.
PROBLEM: Context : Henry Despard (c.1784 -- 30 April 1859) was a New Zealand soldier. 
Question : What year did Henry Despard die?

SOLUTION: date of death

PROBLEM: Context : June 1942, the Aichi H9A was employed in a variety of second-line roles, including anti-submarine missions along the Japanese coasts, transport, paratroop training and liaison. 
Question : What was the year that Aichi H9A entered service?

SOLUTION: service entry

PROBLEM: Context : After his initial education, at the Municipal Board (MB) High School Batala, Lt. General Aftab Ahmad Khan graduated from the Government College, Lahore, and joined the Indian Military Academy, Dehradun. 
Question : When was Aftab Ahmad Khan's death?

SOLUTION:
date of death