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.

Context : Francisco Javier Raya Buenache was born on 20 April 1991 in Madrid. 
Question : What was Javier Raya's career?
occupation

Context : Domitia Longina (c. AD 53-55--c. AD 126-130) was an Empress of Rome and wife to the Roman Emperor Domitian. 
Question : What is Domitia Longina's spouse's name?
spouse

Context : The Vympel NPO R-77 missile (NATO reporting name: AA-12 Adder) is a Russian medium range, active radar homing air-to-air missile system. 
Question : In which year was the service entry date for R-77?

service entry