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 : 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?
[A]: based on


[Q]: Context : Knights of Xentar is a humorous JRPG eroge (meaning it has erotic content). 
Question : To which series does Knights of Xentar belong?
[A]: series


[Q]: Context : The Fiat 3000 was the first tank to be produced in series in Italy. 
Question : In which year was the service entry date for Fiat 3000?
[A]:
service entry