instruction:
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.
question:
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?
answer:
based on


question:
Context : George W. George also worked as a television and film screenwriter in the 1950s and early 1960s. 
Question : What medical condition did George W. George have at the end of his life?
answer:
medical condition


question:
Context : Carl Holtz died, quietly, from complications due to Alzheimer's disease early in the morning of July 8, 2006. 
Question : What medical condition did Carl Holtz have at the end of his life?
answer:

medical condition