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.

Context : Columbus Nova is an investment company founded in 2000 and centered in New York City. 
Question : Which company is the parent company of Columbus Nova?
parent company

Context : Grace Darling died of tuberculosis in October 1842, aged 26. 
Question : Which medical condition afflicts Grace Darling?
medical condition

Context : The World Is Not Enough premiered on 19 November 1999 in the United States and on 26 November 1999 in the United Kingdom. 
Question : Of what series is The World Is Not Enough a part of?

series