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 : MCA Records was an American-based record company owned by MCA Inc., which later gave way to the larger MCA Music Entertainment Group (now Universal Music Group), of which MCA Records was still part. 
Question : Which company is the parent company of MCA Records?
[A]: parent company


[Q]: Context : The Suomi KP/-31 (Suomi-konepistooli or ``Submachine-gun Finland'') was a submachine gun (SMG) of Finnish design used during World War II. It was a descendant of the M-22 prototype and the KP/-26 production model, which was revealed to the public in 1925. 
Question : What was the year Suomi KP/-31 entered service?
[A]:
service entry