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 : Des racines et des ailes is a French television documentary series created by Patrick de Carolis and Patrick Charles in 1997. 
Question : Where network aired Des racines et des ailes?

A: original network
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Q: Context : The Tiuna was created to compete with the American-made Humvee, which was first shown to the public on July 20, 2004. 
Question : What year did Tiuna come into use?

A: service entry
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Q: Context : The Sinclair Scientific calculator was a 12-function, pocket-sized scientific calculator introduced in 1974, dramatically undercutting in price other calculators available at the time. 
Question : In which year was the service entry date for Sinclair Scientific?

A:
service entry
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