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.

[EX Q]: Context : ``Cha-Ka'' is the first episode of the first season of the 1974 American television series Land of the Lost. 
Question : What is the series that Cha-Ka is a part of?
[EX A]: series

[EX Q]: Context : Justine Siegemund or Siegemundin (26 December 1636 -- 10 November 1705) was a renowned German midwife whose Court Midwife (1690) was the more read, but not the first, female-published German obstetrical manual. 
Question : What is the date of Justine Siegemund's death?
[EX A]: date of death

[EX Q]: Context : ``The Mook, the Chef, the Wife and Her Homer'' is the season premiere of The Simpsons'' eighteenth season and first aired September 10, 2006. 
Question : What series is the episode The Mook, the Chef, the Wife and Her Homer part of?
[EX A]:
series