TASK DEFINITION: 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.
PROBLEM: 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?

SOLUTION: based on

PROBLEM: Context : Micah True was born Michael Randall Hickman in Oakland, California, the son of a World War II Marine Corps Gunnery Sergeant and the second of four children. 
Question : What city is Micah True from?

SOLUTION: residence

PROBLEM: Context : Mary Tighe was born in Dublin to Theodosia Tighe, a Methodist leader, and William Blachford (d.1773?), a Church of Ireland clergyman and librarian. 
Question : What was the sickness that killed Mary Tighe?

SOLUTION:
medical condition