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.

[EX Q]: Context : Fifth Air Force was a United States Army Air Forces combat air force in the Pacific Theater of World War II, engaging in combat operations primarily in the Southwest Pacific AOR. 
Question : What military branch was Fifth Air Force associated with?
[EX A]: military branch

[EX Q]: Context : PSR J1719-1438 was discovered in 2011 by the High Time Resolution Survey, a radio astronomy search for astronomical objects that rapidly vary in radio brightness, such as pulsars. 
Question : What is the constellation that PSR J1719-1438 is a part of?
[EX A]: constellation

[EX Q]: Context : Windows 10 also allows web apps and desktop software (using either Win32 or .NET Framework) to be packaged for distribution on the Windows Store. 
Question : Which is the basis of Windows 10?
[EX A]:
based on