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 : Leon de Winter was born on 24 February 1954 in Den Bosch, in the southern Netherlands. 
Question : What was Leon de Winter's occupation?
occupation

Context : Elections to the European Parliament were held in Belgium on June 13, 2004. 
Question : When did Elections to the European Parliament occurr?
point in time

Context : Hans Lotter (17 November 1917 -- 21 November 2008) was a highly decorated Oberleutnant in the Luftwaffe during World War II, and a recipient of the Knight's Cross of the Iron Cross. 
Question : In what military branch did Hans Lotter serve?

military branch