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.

Example Input: Context : Narcissus in Chains is the tenth book in the Anita Blake: 
Question : What is the series that Narcissus in Chains is a part of?
Example Output: series

Example Input: Context : A native of the town of Amatrice in the Papal State of Latium (modern neighboring Province of Rieti in the Lazio region), Nicola Filotesio also appears in contemporary records as Cola dell'Amatrice or Cola Amatricius. 
Question : What year did Nicola Filotesio die in?
Example Output: date of death

Example Input: Context : Braathens SAFE retained an international charter service using the DC-3 and DC-6. 
Question : Which company is the parent company of Braathens?
Example Output:
parent company