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 : From a calendar entry, Djer is known to have died on a 7 Peret III while Djet began his reign on 22 Peret IV. The reason for the 45 days of interregnum is unknown. 
Question : What is Djet's spouse's name?

Answer: spouse


Question: Context : LOT Charters launched flight operations on 1 June 2009. 
Question : What is LOT Charters's parent company?

Answer: parent company


Question: Context : Francis Fessenden was born in Portland, Maine, in the spring of 1839. 
Question : What armed force was Francis Fessenden in?

Answer:
military branch