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.

Example Input: Context : A Rum Collins is a cocktail based on the Tom Collins substituting a light rum for the gin. 
Question : Which is the basis of Rum Collins?
Example Output: based on

Example Input: Context : Udo Cordes (22 July 1921 -- 7 March 2007) was a highly decorated Oberleutnant in the Luftwaffe during World War II, and a recipient of the Knight's Cross of the Iron Cross. 
Question : What award was received by Udo Cordes?
Example Output: award received

Example Input: Context : DVD Movie Guide's Colin Jacobson, who listed the episode as one of his favorites from season three, said that ``on the surface, 'Saturdays of Thunder' essentially just rehashes'' the theme of the previous episode, ``Lisa's Pony'', in which Homer tries to be a better father for Lisa. 
Question : Which series is Saturdays of Thunder a part of?
Example Output:
series