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 : ISO 3166-2:SS is the entry for South Sudan in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1. 
Question : Who set the standards for ISO 3166-2:SS?
[A]: standards body


[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?
[A]: military branch


[Q]: Context : Nicolás Almagro Sánchez (Spanish pronunciation: (nikoˈlas alˈmaɣɾo ˈsantʃeθ); born 21 August 1985 in Murcia, Spain) is a Spanish professional tennis player, ranked world no. 74 on the ATP World Tour. 
Question : What city is Nicolás Almagro associated with?
[A]:
residence