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 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?

A: original network
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Q: Context : Margo Johns (1919 -- 29 September 2009) was a British actress and the first wife of actor William Franklyn. 
Question : What is Margo Johns's spouse's name?

A: spouse
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Q: Context : The Tiger II was under-powered, like many other heavy tanks of World War II, and consumed a lot of fuel, which was in short supply for the Germans. 
Question : In what year did Tiger II enter service?

A:
service entry
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