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 : In cryptography, the IDEA NXT algorithm (previously known as FOX) is a block cipher designed by Pascal Junod and Serge Vaudenay of EPFL (Lausanne, Switzerland). 
Question : Which is the basis of IDEA NXT?

A: based on
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Q: Context : Geoffrey Burnand was born in Hastings, Sussex to an English father, a Colonel in the British Army, and an Irish mother. 
Question : Which is the date of death for Geoffrey Burnand?

A: date of death
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Q: Context : Richard Rahl, major character in The Omen Machine and protagonist in The Sword of Truth series. 
Question : Which show does The Omen Machine appear on?

A:
series
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