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.

Context : The King and I is a musical, the fifth by the team of composer Richard Rodgers and dramatist Oscar Hammerstein II. It is based on the 1944 novel Anna and the King of Siam by Margaret Landon, which is in turn derived from the memoirs of Anna Leonowens, governess to the children of King Mongkut of Siam in the early 1860s. 
Question : The The King and I is based upon what?
based on

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?
medical condition

Context : In the 1991 Gulf War, AMX-30s were deployed by both the French and Qatari armies. 
Question : In what year did AMX-30 enter service?

service entry