instruction:
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.
question:
Context : Designated MA-31 in US service, the first launch of the missile took place in August 1996. 
Question : In which year was the service entry date for MA-31?
answer:
service entry


question:
Context : Elections to the European Parliament were held in Belgium on June 10, 1979. 
Question : What was the date of Elections to the European Parliament?
answer:
point in time


question:
Context : Lead Balloon is a British television series produced by Open Mike Productions for BBC Four. 
Question : Which channel broadcast Lead Balloon?
answer:

original network