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 : North Tonight was a Scottish nightly regional news programme covering the North of Scotland, produced by STV North (formerly Grampian Television). 
Question : Which network broadcasted North Tonight?
Example Output: original network

Example Input: Context : Ragnarok DS, known in Japan as Ragnarok Online DS (ラグナロクオンラインDS), is a Nintendo DS video game based on the MMORPG Ragnarok Online and was released in Japan on December 18, 2008. 
Question : What series is Ragnarok DS part of?
Example Output:
series