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 Bill was the longest-running police procedural television series in the United Kingdom until its cancellation, and was among the longest running of any British television series. 
Question : What network did The Bill originally appear on?
original network

Context : François-André Baudin fell ill and was left behind on île de France in April 1801. 
Question : When was François-André Baudin's death?
date of death

Context : At FCM Jammy and Savatier finished the Char 2C prototype, the other nine tanks being built almost simultaneously; all ten were delivered in 1921 and modified by the factory until 1923. 
Question : In which year was the service entry date for Char 2C?

service entry