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.

Q: Context : Hiram Burnham (1814 -- September 29, 1864) was an officer in the Union Army who commanded a regiment and then a brigade in the Eastern Theater of the American Civil War. 
Question : What military organization did Hiram Burnham belong to?

A: military branch
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Q: Context : Max Matern (19 January 1902 -- 22 May 1935) was a member of the Communist Party of Germany (KPD). 
Question : Which crime led to the conviction of Max Matern?

A: convicted of
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Q: Context : The Dragunov sniper rifle (formal Russian: Снайперская Винтовка системы Драгунова образца 1963 года Snayperskaya Vintovka sistem'y Dragunova obraz'tsa 1963 goda (SVD-63), officially ``Sniper Rifle, System of Dragunov, Model of the Year 1963'') is a semi-automatic sniper/designated marksman rifle chambered in 7.62×54mmR and developed in the Soviet Union. 
Question : In which year was the service entry date for Dragunov sniper rifle?

A:
service entry
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