Task: Question Generation
Input (English): Context : John Kelvin Koelsch (December 22, 1923 -- October 16, 1951) was a United States Navy officer and a recipient of America's highest military decoration -- the Medal of Honor -- for his actions in the Korean War. 
Subject : John Kelvin Koelsch 
Relation : military branch
Output (English): In what military branch did John Kelvin Koelsch serve?