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.
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Question: Context : On 4 November 2010, Qantas Flight 32, an Airbus A380 registered VH-OQA, fitted with four Trent 972 engines manufactured by Rolls-Royce, suffered an uncontained turbine disc failure of its left inboard engine shortly after taking off from Singapore Changi Airport en route to Sydney. 
Question : What is Qantas's parent company?

Answer: parent company


Question: Context : However, in 644, Hormuzan was killed by Umar's son 'Ubaid-Allah, after an involvement in a plot which killed Umar. 
Question : Which war did Hormuzan participate in?

Answer: conflict


Question: Context : Frederick Hollyer died 21 November 1933 at his eldest son's home in Blewbury (then part of Berkshire), aged 95. 
Question : What was Frederick Hollyer's career?

Answer:
occupation