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 : 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?

SOLUTION: military branch

PROBLEM: Context : Chorus Gentlemen is a Canadian music television series which aired on CBC Television from 1965 to 1967. 
Question : On what channel did Chorus Gentlemen first appear?

SOLUTION: original network

PROBLEM: Context : The Soviets had 411 T-28 tanks when the Germans invaded the Soviet Union in June 1941. 
Question : What year is T-28 associated with?

SOLUTION:
service entry