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 : MAP Linhas Aéreas is a domestic airline based in Manaus, Brazil, founded in 2011 authorized to operate regular and non-regular charter flights within Brazil. 
Question : What is MAP Linhas Aéreas's parent company?
[A]: parent company


[Q]: Context : Grace Darling died of tuberculosis in October 1842, aged 26. 
Question : Which medical condition afflicts Grace Darling?
[A]: medical condition


[Q]: Context : Ludwik Gross (September 11, 1904 -- July 19, 1999) was a Polish-American virologist who discovered two different tumor viruses, murine leukemia virus and mouse polyomavirus, capable of causing cancers in laboratory mice. 
Question : What was Ludwik Gross's occupation?
[A]:
occupation