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 : State testing began on 24 November 1974, and the Kh-25 entered production in 1975. 
Question : What year was the service entry date for Kh-25?

A: service entry
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Q: Context : Kivalliq Air, the scheduled airline division of Keewatin Air, began operations in December 1999. 
Question : Which company is the parent company of Kivalliq Air?

A: parent company
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Q: Context : Xiao Qiang (Chinese: 萧强; pinyin: Xiāo Qiáng) is the Founder and Editor-in-Chief of China Digital Times, a bi-lingual China news website. 
Question : What is the name university that educated Xiao Qiang?

A:
educated at
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