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 : Filmed primarily in Canada with a Canadian director (Ted Kotcheff), Switching Channels features many popular Canadian character actors in supporting roles: 
Question : The Switching Channels is based upon what?
based on

Context : Khaleda Zia was the First Lady of Bangladesh during the presidency of her husband Ziaur Rahman. 
Question : Which gender does Khaleda Zia belong to?
sex or gender

Context : Elections to the European Parliament were held in Belgium on June 17, 1984. 
Question : The date of Elections to the European Parliament was what?

point in time