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 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 : From 1976 to 1980, Gerd Langguth was a member of the Bundestag for the Christian Democratic Union. 
Question : What was the date of death of Gerd Langguth?

A: date of death
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Q: Context : Trondheim Energi was founded in 1901 as Trondhjems Elektricitetsværk og Sporvei to build a power plant in Øvre Leirfoss and operate the Trondheim Tramway. 
Question : What is Trondheim Energi's parent company?

A:
parent company
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