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.

[Q]: Context : Moultrie Patten died from pneumonia in Beaverton, Oregon, on March 18, 2009, at the age of 89. 
Question : What was Moultrie Patten's career?
[A]: occupation


[Q]: Context : In 622, the year of Muhammad's migration to Yathrib (now Medina), Ali risked his life by sleeping in Muhammad's bed to impersonate him and thwart an assassination plot so that Muhammad could escape in safety. 
Question : What is Ali's spouse's name?
[A]: spouse


[Q]: Context : Operation Neretva '93 was an Army of the Republic of Bosnia and Herzegovina (ARBiH) operation against the Croatian Defence Council (HVO) in September 1993 on a 200 km long front from Gornji Vakuf to south of Mostar, one of its largest of the year, on areas which were included in the Croatian Republic of Herzeg-Bosnia. 
Question : On what date did Operation Neretva '93 take place?
[A]:
point in time