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.

Ex Input:
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?

Ex Output:
service entry


Ex Input:
Context : Manolo Reyes died of complications from Parkinson's disease on January 3, 2008 at the age of 83. 
Question : What caused Manolo Reyes's death?

Ex Output:
medical condition


Ex Input:
Context : The Yorkshire Mounted Brigade was a formation of the Territorial Force of the British Army, organised in 1908. 
Question : What army did Yorkshire Mounted Brigade serve in?

Ex Output:

military branch