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 : Jane Stafford (1899--1991) was an American medical writer and chemist. 
Question : What is the date of Jane Stafford's death?
[EX A]: date of death

[EX Q]: Context : Devuan is a fork of the Debian Linux distribution. 
Question : The Devuan is based upon what?
[EX A]: based on

[EX Q]: Context : ``Halloween Surprise'' was written by Michael Schur and directed by Dean Holland. 
Question : To which series does Halloween Surprise belong?
[EX A]:
series