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 : Oleg Dozmorov was born in Yekaterinburg, Russia (former part of the Soviet Union) in 1974. 
Question : What was Oleg Dozmorov's career?

SOLUTION: occupation

PROBLEM: Context : Rigó Jancsi (Hungarian pronunciation: (ˈriɡoː ˈjɒnt͡ʃi)) is a traditional Hungarian cube-shaped chocolate sponge cake and chocolate cream pastry. 
Question : What was Rigó Jancsi's career?

SOLUTION: occupation

PROBLEM: Context : The Swedish lute (Swedish: svensk luta) is a musical instrument developed from the early cittern, with a theorbo'ed neck with several bass strings running offset from the fretboard. 
Question : Which is the basis of Swedish lute?

SOLUTION:
based on