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 : Christopher Drew Carter (born September 5, 1981) is a former American football wide receiver of the National Football League. 
Question : What is the name of university that educated Drew Carter?

SOLUTION: educated at

PROBLEM: Context : Miles Flint (born in July 1953) is the former President of Sony Ericsson Mobile Communications AB since June 2004. 
Question : What is the name university that educated Miles Flint?

SOLUTION: educated at

PROBLEM: Context : The Soviet RPG-22 Netto is a one-shot disposable anti-tank rocket launcher first deployed in 1985, based on the RPG-18 rocket launcher, but firing a larger 72.5 mm fin stabilised projectile. 
Question : In what year did RPG-22 enter service?

SOLUTION:
service entry